[BOT ISSUE] Google: add missing `deep-research-preview-04-2026`, `deep-research-max-preview-04-2026`

[github-actions]

Missing models

The Google Gemini deep-research models are not present in the proxy model catalog (packages/proxy/schema/model_list.json).

Model IDs to add

Model ID	Provider(s)	Format	Flavor
deep-research-preview-04-2026	google	google	chat
deep-research-max-preview-04-2026	google	google	chat

Details

Released on April 21, 2026 via the Gemini API changelog:

• deep-research-preview-04-2026: Designed for speed and efficiency, ideal for streaming results back to a client UI. Supports collaborative planning, visualization, MCP server integration, and File Search.
• deep-research-max-preview-04-2026: Maximum comprehensiveness for automated context gathering and synthesis. Same feature set.

These follow the pattern of OpenAI's deep-research models already in the catalog (o3-deep-research, o4-mini-deep-research).

Pricing

The Google pricing page states that deep research agents are "charged at standard Gemini list rates." Exact per-token pricing is not explicitly broken out for these model IDs. Suggested approach: omit pricing fields until Google publishes dedicated rates, or use Gemini 2.5 Pro rates as an estimate.

Suggested entry

"deep-research-preview-04-2026": {
  "format": "google",
  "flavor": "chat",
  "multimodal": true,
  "displayName": "Deep Research Preview (04-2026)",
  "reasoning": true,
  "experimental": true,
  "max_input_tokens": 1048576,
  "max_output_tokens": 65536
}

Verification checklist

• Cross-source: Model IDs confirmed on Gemini API changelog (April 21, 2026) and Gemini API models page
• Recent commits: Not covered by any recent commit to model_list.json
• ID format: Follows Google's {model}-preview-{mm}-{yyyy} naming convention
• Existing issues: No existing issue covers these model IDs