[BOT ISSUE] Add perplexity/sonar (Perplexity Agent API)

[github-actions]

Summary

The model perplexity/sonar is available on Perplexity's Agent API but is not in the catalog. This is distinct from the existing sonar entry which uses the Sonar API (chat.completions.create) at $1.00/$1.00. The perplexity/sonar model uses the Agent API (responses.create) at $0.25/$2.50.

Model Details

Field	Value
Model ID	perplexity/sonar
Provider	Perplexity
Format	openai
Flavor	chat
input_cost_per_mil_tokens	0.25
output_cost_per_mil_tokens	2.50
input_cache_read_cost_per_mil_tokens	0.0625
max_input_tokens	Not published by provider
max_output_tokens	Not published by provider

Verification

Check	Result
In catalog?	No — grep confirms no perplexity/sonar entry
Cross-source verified?	Yes (2 independent sources)
Deprecated/retiring within 90 days?	No
Duplicate of existing open issue?	No
Embedding model?	No
Vision-only model?	No

Sources

1. Perplexity Agent API Models — Lists perplexity/sonar with $0.25/$2.50 pricing under Agent API section
2. Perplexity Migration Guide — Documents the sonar → perplexity/sonar migration path between Sonar API and Agent API

Notes

• Existing catalog entry sonar ($1.00/$1.00, max_input_tokens: 128000) uses Sonar API (chat.completions.create)
• perplexity/sonar uses Agent API (responses.create) — different endpoint, different pricing, different model ID prefix
• Token limits for Agent API models are not published on the Perplexity docs

[github-actions]

Autofix skipped because the issue body/title did not contain parseable bot metadata for a model catalog change.