[BOT ISSUE] Cost update: mistral-small-latest pricing and context window stale

[github-actions]

Summary

The mistral-small-latest entry in model_list.json has stale pricing and context window values. Mistral Small has been updated to "Mistral Small 4" (released March 2025) with significantly different specs.

Current values in catalog

Field	Current Value	Correct Value
input_cost_per_mil_tokens	0.06	0.15
output_cost_per_mil_tokens	0.18	0.60
max_input_tokens	131072	262144
max_output_tokens	131072	262144

Verification

• Source 1: Mistral pricing overview page (https://docs.mistral.ai/getting-started/models/overview/) — lists Mistral Small at $0.15/$0.60 with 256k context
• Source 2: Mistral Small 4 model card (https://docs.mistral.ai/models/model-cards/mistral-small-4-0-26-03) — confirms 262144 token context, $0.15 input / $0.60 output per 1M tokens
• ID format: mistral-small-latest matches existing naming convention in catalog
• Recent commits: No recent commits updating this model's pricing

Suggested fix

Update the mistral-small-latest entry in packages/proxy/schema/model_list.json (currently around line 4966):

"mistral-small-latest": {
  "format": "openai",
  "flavor": "chat",
  "input_cost_per_mil_tokens": 0.15,
  "output_cost_per_mil_tokens": 0.60,
  "displayName": "Mistral Small",
  "max_input_tokens": 262144,
  "max_output_tokens": 262144,
  "available_providers": ["mistral"]
}

[github-actions]

Prepared catalog updates for mistral-small-latest. Updated models: mistral-small-latest.

Verification sources: https://mistral.ai/pricing/, https://docs.mistral.ai/models/model-cards/mistral-small-4-0-26-03/
Verified metadata applied:

• mistral-small-latest: format=openai, flavor=chat, displayName=Mistral Small, max_input_tokens=262144, max_output_tokens=131072, pricing(input/output per 1M)=0.1/0.3, providers=mistral, multimodal=true

Opened #688 to apply the catalog update.