[BOT ISSUE] Mistral: add missing `voxtral-small-2507` model

[github-actions]

Gap

The model voxtral-small-2507 (Voxtral Small) is listed on Mistral's models page and pricing page as a current, non-deprecated model, but is missing from the proxy catalog. It is a multimodal text+audio chat model that supports the standard /v1/chat/completions endpoint for both text-only and audio-input prompts.

Official sources

Field	Source	URL
Model ID, capabilities	Mistral models page	https://docs.mistral.ai/getting-started/models
Model ID, pricing	Mistral pricing page	https://mistral.ai/pricing

Verified fields

• Model ID: voxtral-small-2507 — confirmed on Mistral models page (listed as voxtral-small-25-07 in overview, voxtral-small-2507 on model card)
• Format: openai — Mistral convention (all Mistral models in catalog use openai format)
• Flavor: chat — supports /v1/chat/completions
• Input cost: $0.10 / 1M tokens (text) — confirmed on pricing page
• Output cost: $0.40 / 1M tokens — confirmed on pricing page
• Context window (max_input_tokens): 32000 — confirmed on model card page
• Available providers: ["mistral"]
• Multimodal: true — supports text and audio input

Fields NOT published

• max_output_tokens: Not specified on docs. Should be omitted or left for manual review.
• reasoning: Not documented. Omit.
• Audio input pricing: $0.004 / minute — listed on pricing page but not a standard catalog field.

Verification Checklist

Check	Status	Detail
Cross-source	✅	Model ID confirmed on Mistral models page AND Mistral pricing page
Already-fixed	✅	voxtral-small-2507 not present in model_list.json or index.ts
ID format	✅	voxtral-small-2507 follows Mistral naming convention — consistent with devstral-small-2507, mistral-small-2603
Duplicate check	✅	No existing open issue covers voxtral-small-2507

Local Files Inspected

• packages/proxy/schema/model_list.json — confirmed no voxtral entries exist anywhere in the file
• packages/proxy/schema/index.ts — confirmed no voxtral entries in AvailableEndpointTypes

{
  "kind": "missing_model",
  "provider": "mistral",
  "models": ["voxtral-small-2507"],
  "status": "active",
  "model_specs": {
    "voxtral-small-2507": {
      "format": "openai",
      "flavor": "chat",
      "multimodal": true,
      "input_cost_per_mil_tokens": 0.1,
      "output_cost_per_mil_tokens": 0.4,
      "max_input_tokens": 32000,
      "available_providers": ["mistral"]
    }
  },
  "source_urls": [
    "https://docs.mistral.ai/getting-started/models",
    "https://mistral.ai/pricing"
  ]
}

[github-actions]

Prepared catalog updates for voxtral-small-2507. Added models: voxtral-small-2507.

Verification sources: https://docs.mistral.ai/getting-started/models, https://mistral.ai/pricing
Verified metadata applied:

• voxtral-small-2507: format=openai, flavor=chat, max_input_tokens=32000, max_output_tokens=not provided, pricing(input/output per 1M)=0.1/0.4, providers=mistral, multimodal=true

Included in the daily batch PR: #822