backend new models check - gemini - 2026-09-16

Files checked: src/backend/drivers/ai-chat/providers/gemini/models.ts, src/backend/drivers/ai-image/providers/gemini/models.ts, src/backend/drivers/ai-video/providers/gemini/models.ts, src/backend/drivers/ai-tts/providers/gemini/costs.ts

chat (7)

• gemini-3.1-pro-preview-customtools | aliases: none | context: 1048576 | created: n/a | price: see provider pricing page Notes: custom-tools variant of already-covered gemini-3.1-pro-preview; not a dated snapshot so not auto-collapsed.
• gemini-omni-flash-preview | aliases: none | context: 131072 | created: n/a | price: see provider pricing page
• gemini-omni-1.1-flash | aliases: none | context: 131072 | created: n/a | price: see provider pricing page
• gemini-robotics-er-2-preview | aliases: none | context: 131072 | created: n/a | price: see provider pricing page Notes: modality? — embodied-reasoning/robotics-specialized model, not a general chat model; verify relevance before adding.
• antigravity-preview-05-2026 | aliases: none | context: 1048576 | created: n/a (May-2026 per name) | price: see provider pricing page Notes: modality? — specialized coding-agent preview; superseded by antigravity-preview-09-2026 below (same family).
• antigravity-preview-09-2026 | aliases: none | context: 1048576 | created: n/a (Sep-2026 per name) | price: see provider pricing page Notes: modality? — likely the current pointer of the Antigravity agent family.
• deep-research-max-preview-04-2026 | aliases: none | context: 131072 | created: n/a (Apr-2026 per name) | price: see provider pricing page Notes: modality? — specialized deep-research agent, not a general chat model.
• deep-research-preview-04-2026 | aliases: none | context: 131072 | created: n/a (Apr-2026 per name) | price: see provider pricing page Notes: modality? — same family as above.

image (1)

• nano-banana-pro-preview | aliases: none | context: 131072 | created: n/a | price: see provider pricing page Notes: same displayName/specs as backend's gemini-3-pro-image-preview (which already aliases "nano-banana-pro") — very likely just another alias for that same model rather than a distinct new model; recommend adding as an alias instead of a new entry.

skipped (unsupported modality): 18 — examples: gemini-3.5-transcribe, lyria-3-clip-preview, lyria-3.5, gemini-embedding-001, aqa, gemini-3.8-live, lyria-realtime-exp legacy upstream models not in backend (verify intent): gemini-2.5-computer-use-preview-10-2025, deep-research-pro-preview-12-2025