diff --git a/src/routes/epochs/number/parameters.ts b/src/routes/epochs/number/parameters.ts
index 645556a5..1142fd57 100644
--- a/src/routes/epochs/number/parameters.ts
+++ b/src/routes/epochs/number/parameters.ts
@@ -6,7 +6,7 @@ import * as QueryTypes from '../../../types/queries/epochs.js';
 import * as ResponseTypes from '../../../types/responses/epochs.js';
 import { getDbSync } from '../../../utils/database.js';
 import { handle400Custom, handle404 } from '../../../utils/error-handler.js';
-import { sortKeysInObject } from '../../../utils/string-utils.js';
+import { costModelsMap } from '../../../utils/cost-models-map.js';
 import { validatePositiveInRangeSignedInt } from '../../../utils/validation.js';
 
 async function route(fastify: FastifyInstance) {
@@ -36,7 +36,7 @@ async function route(fastify: FastifyInstance) {
         }
 
         if (rows[0].cost_models) {
-          rows[0].cost_models = sortKeysInObject(rows[0].cost_models);
+          rows[0].cost_models = costModelsMap(rows[0].cost_models);
         }
 
         return reply.send(rows[0]);
diff --git a/test/unit/fixtures/epochs.fixtures.ts b/test/unit/fixtures/epochs.fixtures.ts
index fa8b82d3..c12680e6 100644
--- a/test/unit/fixtures/epochs.fixtures.ts
+++ b/test/unit/fixtures/epochs.fixtures.ts
@@ -341,12 +341,8 @@ const query_epoch_number_parameters_regular = {
   min_pool_cost: '340000000',
   nonce: '701241ce057d391aa92b8d88ffcdff361539cb12ea2a5bba4e5f95d66948ffe3',
   cost_models: {
-    PlutusV1: {
-      'addInteger-memory-arguments-intercept': 1,
-      'addInteger-memory-arguments-slope': 1,
-      'addInteger-cpu-arguments-intercept': 205665,
-      'addInteger-cpu-arguments-slope': 812,
-    },
+    PlutusV1: [ 205665, 812, 1, 1, 1000, 571, 0, 1, 1000, 24177, 4, 1, 1000, 32, 117366, 10475, 4, 23000, 100, 23000, 100, 23000, 100, 23000, 100, 23000, 100, 23000, 100, 100, 100, 23000, 100, 19537, 32, 175354, 32, 46417, 4, 221973, 511, 0, 1, 89141, 32, 497525, 14068, 4, 2, 196500, 453240, 220, 0, 1, 1, 1000, 28662, 4, 2, 245000, 216773, 62, 1, 1060367, 12586, 1, 208512, 421, 1, 187000, 1000, 52998, 1, 80436, 32, 43249, 32, 1000, 32, 80556, 1, 57667, 4, 1000, 10, 197145, 156, 1, 197145, 156, 1, 204924, 473, 1, 208896, 511, 1, 52467, 32, 64832, 32, 65493, 32, 22558, 32, 16563, 32, 76511, 32, 196500, 453240, 220, 0, 1, 1, 69522, 11687, 0, 1, 60091, 32, 196500, 453240, 220, 0, 1, 1, 196500, 453240, 220, 0, 1, 1, 806990, 30482, 4, 1927926, 82523, 4, 265318, 0, 4, 0, 85931, 32, 205665, 812, 1, 1, 41182, 32, 212342, 32, 31220, 32, 32696, 32, 43357, 32, 32247, 32, 38314, 32, 57996947, 18975, 10 ],
+    PlutusV2: [ 205665, 812, 1, 1, 1000, 571, 0, 1, 1000, 24177, 4, 1, 1000, 32, 117366, 10475, 4, 23000, 100, 23000, 100, 23000, 100, 23000, 100, 23000, 100, 23000, 100, 100, 100, 23000, 100, 19537, 32, 175354, 32, 46417, 4, 221973, 511, 0, 1, 89141, 32, 497525, 14068, 4, 2, 196500, 453240, 220, 0, 1, 1, 1000, 28662, 4, 2, 245000, 216773, 62, 1, 1060367, 12586, 1, 208512, 421, 1, 187000, 1000, 52998, 1, 80436, 32, 43249, 32, 1000, 32, 80556, 1, 57667, 4, 1000, 10, 197145, 156, 1, 197145, 156, 1, 204924, 473, 1, 208896, 511, 1, 52467, 32, 64832, 32, 65493, 32, 22558, 32, 16563, 32, 76511, 32, 196500, 453240, 220, 0, 1, 1, 69522, 11687, 0, 1, 60091, 32, 196500, 453240, 220, 0, 1, 1, 196500, 453240, 220, 0, 1, 1, 1159724, 392670, 0, 2, 806990, 30482, 4, 1927926, 82523, 4, 265318, 0, 4, 0, 85931, 32, 205665, 812, 1, 1, 41182, 32, 212342, 32, 31220, 32, 32696, 32, 43357, 32, 32247, 32, 38314, 32, 35892428,  10, 57996947, 18975, 10, 38887044, 32947, 10 ],
   },
   price_mem: 0.001,
   price_step: 0.01,
@@ -388,6 +384,345 @@ const response_epoch_number_parameters_regular = {
       'addInteger-cpu-arguments-slope': 812,
       'addInteger-memory-arguments-intercept': 1,
       'addInteger-memory-arguments-slope': 1,
+      'appendByteString-cpu-arguments-intercept': 1000,
+      'appendByteString-cpu-arguments-slope': 571,
+      'appendByteString-memory-arguments-intercept': 0,
+      'appendByteString-memory-arguments-slope': 1,
+      'appendString-cpu-arguments-intercept': 1000,
+      'appendString-cpu-arguments-slope': 24177,
+      'appendString-memory-arguments-intercept': 4,
+      'appendString-memory-arguments-slope': 1,
+      'bData-cpu-arguments': 1000,
+      'bData-memory-arguments': 32,
+      'blake2b_256-cpu-arguments-intercept': 117366,
+      'blake2b_256-cpu-arguments-slope': 10475,
+      'blake2b_256-memory-arguments': 4,
+      'cekApplyCost-exBudgetCPU': 23000,
+      'cekApplyCost-exBudgetMemory': 100,
+      'cekBuiltinCost-exBudgetCPU': 23000,
+      'cekBuiltinCost-exBudgetMemory': 100,
+      'cekConstCost-exBudgetCPU': 23000,
+      'cekConstCost-exBudgetMemory': 100,
+      'cekDelayCost-exBudgetCPU': 23000,
+      'cekDelayCost-exBudgetMemory': 100,
+      'cekForceCost-exBudgetCPU': 23000,
+      'cekForceCost-exBudgetMemory': 100,
+      'cekLamCost-exBudgetCPU': 23000,
+      'cekLamCost-exBudgetMemory': 100,
+      'cekStartupCost-exBudgetCPU': 100,
+      'cekStartupCost-exBudgetMemory': 100,
+      'cekVarCost-exBudgetCPU': 23000,
+      'cekVarCost-exBudgetMemory': 100,
+      'chooseData-cpu-arguments': 19537,
+      'chooseData-memory-arguments': 32,
+      'chooseList-cpu-arguments': 175354,
+      'chooseList-memory-arguments': 32,
+      'chooseUnit-cpu-arguments': 46417,
+      'chooseUnit-memory-arguments': 4,
+      'consByteString-cpu-arguments-intercept': 221973,
+      'consByteString-cpu-arguments-slope': 511,
+      'consByteString-memory-arguments-intercept': 0,
+      'consByteString-memory-arguments-slope': 1,
+      'constrData-cpu-arguments': 89141,
+      'constrData-memory-arguments': 32,
+      'decodeUtf8-cpu-arguments-intercept': 497525,
+      'decodeUtf8-cpu-arguments-slope': 14068,
+      'decodeUtf8-memory-arguments-intercept': 4,
+      'decodeUtf8-memory-arguments-slope': 2,
+      'divideInteger-cpu-arguments-constant': 196500,
+      'divideInteger-cpu-arguments-model-arguments-intercept': 453240,
+      'divideInteger-cpu-arguments-model-arguments-slope': 220,
+      'divideInteger-memory-arguments-intercept': 0,
+      'divideInteger-memory-arguments-minimum': 1,
+      'divideInteger-memory-arguments-slope': 1,
+      'encodeUtf8-cpu-arguments-intercept': 1000,
+      'encodeUtf8-cpu-arguments-slope': 28662,
+      'encodeUtf8-memory-arguments-intercept': 4,
+      'encodeUtf8-memory-arguments-slope': 2,
+      'equalsByteString-cpu-arguments-constant': 245000,
+      'equalsByteString-cpu-arguments-intercept': 216773,
+      'equalsByteString-cpu-arguments-slope': 62,
+      'equalsByteString-memory-arguments': 1,
+      'equalsData-cpu-arguments-intercept': 1060367,
+      'equalsData-cpu-arguments-slope': 12586,
+      'equalsData-memory-arguments': 1,
+      'equalsInteger-cpu-arguments-intercept': 208512,
+      'equalsInteger-cpu-arguments-slope': 421,
+      'equalsInteger-memory-arguments': 1,
+      'equalsString-cpu-arguments-constant': 187000,
+      'equalsString-cpu-arguments-intercept': 1000,
+      'equalsString-cpu-arguments-slope': 52998,
+      'equalsString-memory-arguments': 1,
+      'fstPair-cpu-arguments': 80436,
+      'fstPair-memory-arguments': 32,
+      'headList-cpu-arguments': 43249,
+      'headList-memory-arguments': 32,
+      'iData-cpu-arguments': 1000,
+      'iData-memory-arguments': 32,
+      'ifThenElse-cpu-arguments': 80556,
+      'ifThenElse-memory-arguments': 1,
+      'indexByteString-cpu-arguments': 57667,
+      'indexByteString-memory-arguments': 4,
+      'lengthOfByteString-cpu-arguments': 1000,
+      'lengthOfByteString-memory-arguments': 10,
+      'lessThanByteString-cpu-arguments-intercept': 197145,
+      'lessThanByteString-cpu-arguments-slope': 156,
+      'lessThanByteString-memory-arguments': 1,
+      'lessThanEqualsByteString-cpu-arguments-intercept': 197145,
+      'lessThanEqualsByteString-cpu-arguments-slope': 156,
+      'lessThanEqualsByteString-memory-arguments': 1,
+      'lessThanEqualsInteger-cpu-arguments-intercept': 204924,
+      'lessThanEqualsInteger-cpu-arguments-slope': 473,
+      'lessThanEqualsInteger-memory-arguments': 1,
+      'lessThanInteger-cpu-arguments-intercept': 208896,
+      'lessThanInteger-cpu-arguments-slope': 511,
+      'lessThanInteger-memory-arguments': 1,
+      'listData-cpu-arguments': 52467,
+      'listData-memory-arguments': 32,
+      'mapData-cpu-arguments': 64832,
+      'mapData-memory-arguments': 32,
+      'mkCons-cpu-arguments': 65493,
+      'mkCons-memory-arguments': 32,
+      'mkNilData-cpu-arguments': 22558,
+      'mkNilData-memory-arguments': 32,
+      'mkNilPairData-cpu-arguments': 16563,
+      'mkNilPairData-memory-arguments': 32,
+      'mkPairData-cpu-arguments': 76511,
+      'mkPairData-memory-arguments': 32,
+      'modInteger-cpu-arguments-constant': 196500,
+      'modInteger-cpu-arguments-model-arguments-intercept': 453240,
+      'modInteger-cpu-arguments-model-arguments-slope': 220,
+      'modInteger-memory-arguments-intercept': 0,
+      'modInteger-memory-arguments-minimum': 1,
+      'modInteger-memory-arguments-slope': 1,
+      'multiplyInteger-cpu-arguments-intercept': 69522,
+      'multiplyInteger-cpu-arguments-slope': 11687,
+      'multiplyInteger-memory-arguments-intercept': 0,
+      'multiplyInteger-memory-arguments-slope': 1,
+      'nullList-cpu-arguments': 60091,
+      'nullList-memory-arguments': 32,
+      'quotientInteger-cpu-arguments-constant': 196500,
+      'quotientInteger-cpu-arguments-model-arguments-intercept': 453240,
+      'quotientInteger-cpu-arguments-model-arguments-slope': 220,
+      'quotientInteger-memory-arguments-intercept': 0,
+      'quotientInteger-memory-arguments-minimum': 1,
+      'quotientInteger-memory-arguments-slope': 1,
+      'remainderInteger-cpu-arguments-constant': 196500,
+      'remainderInteger-cpu-arguments-model-arguments-intercept': 453240,
+      'remainderInteger-cpu-arguments-model-arguments-slope': 220,
+      'remainderInteger-memory-arguments-intercept': 0,
+      'remainderInteger-memory-arguments-minimum': 1,
+      'remainderInteger-memory-arguments-slope': 1,
+      'sha2_256-cpu-arguments-intercept': 806990,
+      'sha2_256-cpu-arguments-slope': 30482,
+      'sha2_256-memory-arguments': 4,
+      'sha3_256-cpu-arguments-intercept': 1927926,
+      'sha3_256-cpu-arguments-slope': 82523,
+      'sha3_256-memory-arguments': 4,
+      'sliceByteString-cpu-arguments-intercept': 265318,
+      'sliceByteString-cpu-arguments-slope': 0,
+      'sliceByteString-memory-arguments-intercept': 4,
+      'sliceByteString-memory-arguments-slope': 0,
+      'sndPair-cpu-arguments': 85931,
+      'sndPair-memory-arguments': 32,
+      'subtractInteger-cpu-arguments-intercept': 205665,
+      'subtractInteger-cpu-arguments-slope': 812,
+      'subtractInteger-memory-arguments-intercept': 1,
+      'subtractInteger-memory-arguments-slope': 1,
+      'tailList-cpu-arguments': 41182,
+      'tailList-memory-arguments': 32,
+      'trace-cpu-arguments': 212342,
+      'trace-memory-arguments': 32,
+      'unBData-cpu-arguments': 31220,
+      'unBData-memory-arguments': 32,
+      'unConstrData-cpu-arguments': 32696,
+      'unConstrData-memory-arguments': 32,
+      'unIData-cpu-arguments': 43357,
+      'unIData-memory-arguments': 32,
+      'unListData-cpu-arguments': 32247,
+      'unListData-memory-arguments': 32,
+      'unMapData-cpu-arguments': 38314,
+      'unMapData-memory-arguments': 32,
+      'verifyEd25519Signature-cpu-arguments-intercept': 57996947,
+      'verifyEd25519Signature-cpu-arguments-slope': 18975,
+      'verifyEd25519Signature-memory-arguments': 10
+    },
+    PlutusV2: {
+      'addInteger-cpu-arguments-intercept': 205665,
+      'addInteger-cpu-arguments-slope': 812,
+      'addInteger-memory-arguments-intercept': 1,
+      'addInteger-memory-arguments-slope': 1,
+      'appendByteString-cpu-arguments-intercept': 1000,
+      'appendByteString-cpu-arguments-slope': 571,
+      'appendByteString-memory-arguments-intercept': 0,
+      'appendByteString-memory-arguments-slope': 1,
+      'appendString-cpu-arguments-intercept': 1000,
+      'appendString-cpu-arguments-slope': 24177,
+      'appendString-memory-arguments-intercept': 4,
+      'appendString-memory-arguments-slope': 1,
+      'bData-cpu-arguments': 1000,
+      'bData-memory-arguments': 32,
+      'blake2b_256-cpu-arguments-intercept': 117366,
+      'blake2b_256-cpu-arguments-slope': 10475,
+      'blake2b_256-memory-arguments': 4,
+      'cekApplyCost-exBudgetCPU': 23000,
+      'cekApplyCost-exBudgetMemory': 100,
+      'cekBuiltinCost-exBudgetCPU': 23000,
+      'cekBuiltinCost-exBudgetMemory': 100,
+      'cekConstCost-exBudgetCPU': 23000,
+      'cekConstCost-exBudgetMemory': 100,
+      'cekDelayCost-exBudgetCPU': 23000,
+      'cekDelayCost-exBudgetMemory': 100,
+      'cekForceCost-exBudgetCPU': 23000,
+      'cekForceCost-exBudgetMemory': 100,
+      'cekLamCost-exBudgetCPU': 23000,
+      'cekLamCost-exBudgetMemory': 100,
+      'cekStartupCost-exBudgetCPU': 100,
+      'cekStartupCost-exBudgetMemory': 100,
+      'cekVarCost-exBudgetCPU': 23000,
+      'cekVarCost-exBudgetMemory': 100,
+      'chooseData-cpu-arguments': 19537,
+      'chooseData-memory-arguments': 32,
+      'chooseList-cpu-arguments': 175354,
+      'chooseList-memory-arguments': 32,
+      'chooseUnit-cpu-arguments': 46417,
+      'chooseUnit-memory-arguments': 4,
+      'consByteString-cpu-arguments-intercept': 221973,
+      'consByteString-cpu-arguments-slope': 511,
+      'consByteString-memory-arguments-intercept': 0,
+      'consByteString-memory-arguments-slope': 1,
+      'constrData-cpu-arguments': 89141,
+      'constrData-memory-arguments': 32,
+      'decodeUtf8-cpu-arguments-intercept': 497525,
+      'decodeUtf8-cpu-arguments-slope': 14068,
+      'decodeUtf8-memory-arguments-intercept': 4,
+      'decodeUtf8-memory-arguments-slope': 2,
+      'divideInteger-cpu-arguments-constant': 196500,
+      'divideInteger-cpu-arguments-model-arguments-intercept': 453240,
+      'divideInteger-cpu-arguments-model-arguments-slope': 220,
+      'divideInteger-memory-arguments-intercept': 0,
+      'divideInteger-memory-arguments-minimum': 1,
+      'divideInteger-memory-arguments-slope': 1,
+      'encodeUtf8-cpu-arguments-intercept': 1000,
+      'encodeUtf8-cpu-arguments-slope': 28662,
+      'encodeUtf8-memory-arguments-intercept': 4,
+      'encodeUtf8-memory-arguments-slope': 2,
+      'equalsByteString-cpu-arguments-constant': 245000,
+      'equalsByteString-cpu-arguments-intercept': 216773,
+      'equalsByteString-cpu-arguments-slope': 62,
+      'equalsByteString-memory-arguments': 1,
+      'equalsData-cpu-arguments-intercept': 1060367,
+      'equalsData-cpu-arguments-slope': 12586,
+      'equalsData-memory-arguments': 1,
+      'equalsInteger-cpu-arguments-intercept': 208512,
+      'equalsInteger-cpu-arguments-slope': 421,
+      'equalsInteger-memory-arguments': 1,
+      'equalsString-cpu-arguments-constant': 187000,
+      'equalsString-cpu-arguments-intercept': 1000,
+      'equalsString-cpu-arguments-slope': 52998,
+      'equalsString-memory-arguments': 1,
+      'fstPair-cpu-arguments': 80436,
+      'fstPair-memory-arguments': 32,
+      'headList-cpu-arguments': 43249,
+      'headList-memory-arguments': 32,
+      'iData-cpu-arguments': 1000,
+      'iData-memory-arguments': 32,
+      'ifThenElse-cpu-arguments': 80556,
+      'ifThenElse-memory-arguments': 1,
+      'indexByteString-cpu-arguments': 57667,
+      'indexByteString-memory-arguments': 4,
+      'lengthOfByteString-cpu-arguments': 1000,
+      'lengthOfByteString-memory-arguments': 10,
+      'lessThanByteString-cpu-arguments-intercept': 197145,
+      'lessThanByteString-cpu-arguments-slope': 156,
+      'lessThanByteString-memory-arguments': 1,
+      'lessThanEqualsByteString-cpu-arguments-intercept': 197145,
+      'lessThanEqualsByteString-cpu-arguments-slope': 156,
+      'lessThanEqualsByteString-memory-arguments': 1,
+      'lessThanEqualsInteger-cpu-arguments-intercept': 204924,
+      'lessThanEqualsInteger-cpu-arguments-slope': 473,
+      'lessThanEqualsInteger-memory-arguments': 1,
+      'lessThanInteger-cpu-arguments-intercept': 208896,
+      'lessThanInteger-cpu-arguments-slope': 511,
+      'lessThanInteger-memory-arguments': 1,
+      'listData-cpu-arguments': 52467,
+      'listData-memory-arguments': 32,
+      'mapData-cpu-arguments': 64832,
+      'mapData-memory-arguments': 32,
+      'mkCons-cpu-arguments': 65493,
+      'mkCons-memory-arguments': 32,
+      'mkNilData-cpu-arguments': 22558,
+      'mkNilData-memory-arguments': 32,
+      'mkNilPairData-cpu-arguments': 16563,
+      'mkNilPairData-memory-arguments': 32,
+      'mkPairData-cpu-arguments': 76511,
+      'mkPairData-memory-arguments': 32,
+      'modInteger-cpu-arguments-constant': 196500,
+      'modInteger-cpu-arguments-model-arguments-intercept': 453240,
+      'modInteger-cpu-arguments-model-arguments-slope': 220,
+      'modInteger-memory-arguments-intercept': 0,
+      'modInteger-memory-arguments-minimum': 1,
+      'modInteger-memory-arguments-slope': 1,
+      'multiplyInteger-cpu-arguments-intercept': 69522,
+      'multiplyInteger-cpu-arguments-slope': 11687,
+      'multiplyInteger-memory-arguments-intercept': 0,
+      'multiplyInteger-memory-arguments-slope': 1,
+      'nullList-cpu-arguments': 60091,
+      'nullList-memory-arguments': 32,
+      'quotientInteger-cpu-arguments-constant': 196500,
+      'quotientInteger-cpu-arguments-model-arguments-intercept': 453240,
+      'quotientInteger-cpu-arguments-model-arguments-slope': 220,
+      'quotientInteger-memory-arguments-intercept': 0,
+      'quotientInteger-memory-arguments-minimum': 1,
+      'quotientInteger-memory-arguments-slope': 1,
+      'remainderInteger-cpu-arguments-constant': 196500,
+      'remainderInteger-cpu-arguments-model-arguments-intercept': 453240,
+      'remainderInteger-cpu-arguments-model-arguments-slope': 220,
+      'remainderInteger-memory-arguments-intercept': 0,
+      'remainderInteger-memory-arguments-minimum': 1,
+      'remainderInteger-memory-arguments-slope': 1,
+      'serialiseData-cpu-arguments-intercept': 1159724,
+      'serialiseData-cpu-arguments-slope': 392670,
+      'serialiseData-memory-arguments-intercept': 0,
+      'serialiseData-memory-arguments-slope': 2,
+      'sha2_256-cpu-arguments-intercept': 806990,
+      'sha2_256-cpu-arguments-slope': 30482,
+      'sha2_256-memory-arguments': 4,
+      'sha3_256-cpu-arguments-intercept': 1927926,
+      'sha3_256-cpu-arguments-slope': 82523,
+      'sha3_256-memory-arguments': 4,
+      'sliceByteString-cpu-arguments-intercept': 265318,
+      'sliceByteString-cpu-arguments-slope': 0,
+      'sliceByteString-memory-arguments-intercept': 4,
+      'sliceByteString-memory-arguments-slope': 0,
+      'sndPair-cpu-arguments': 85931,
+      'sndPair-memory-arguments': 32,
+      'subtractInteger-cpu-arguments-intercept': 205665,
+      'subtractInteger-cpu-arguments-slope': 812,
+      'subtractInteger-memory-arguments-intercept': 1,
+      'subtractInteger-memory-arguments-slope': 1,
+      'tailList-cpu-arguments': 41182,
+      'tailList-memory-arguments': 32,
+      'trace-cpu-arguments': 212342,
+      'trace-memory-arguments': 32,
+      'unBData-cpu-arguments': 31220,
+      'unBData-memory-arguments': 32,
+      'unConstrData-cpu-arguments': 32696,
+      'unConstrData-memory-arguments': 32,
+      'unIData-cpu-arguments': 43357,
+      'unIData-memory-arguments': 32,
+      'unListData-cpu-arguments': 32247,
+      'unListData-memory-arguments': 32,
+      'unMapData-cpu-arguments': 38314,
+      'unMapData-memory-arguments': 32,
+      'verifyEcdsaSecp256k1Signature-cpu-arguments': 35892428,
+      'verifyEcdsaSecp256k1Signature-memory-arguments': 10,
+      'verifyEd25519Signature-cpu-arguments-intercept': 57996947,
+      'verifyEd25519Signature-cpu-arguments-slope': 18975,
+      'verifyEd25519Signature-memory-arguments': 10,
+      'verifySchnorrSecp256k1Signature-cpu-arguments-intercept': 38887044,
+      'verifySchnorrSecp256k1Signature-cpu-arguments-slope': 32947,
+      'verifySchnorrSecp256k1Signature-memory-arguments': 10
     },
   },
   price_mem: 0.001,