Google / google/gemini-3.1-pro-preview
Gemini 3.1 Pro Preview - access through LLMTR
Positioned for teams that want stronger reasoning, better token efficiency, and more consistent output on difficult tasks. Strong for codebases, research workflows, and tool-heavy product experiences.
Technical specifications
| Canonical ID | google/gemini-3.1-pro-preview |
|---|---|
| Provider | |
| Context window | 1,048,576 tokens |
| Operations | CHAT_COMPLETIONS, RESPONSES |
| Modalities | text, image, audio, video |
Pricing
An 8% platform margin applies to credit top-ups; model usage prices are not separately marked up.
| Operation | Metric | Unit | Price |
|---|---|---|---|
| CHAT_COMPLETIONS | INPUT_TEXT | PER_1M_TOKENS | $2.00 |
| CHAT_COMPLETIONS | OUTPUT_TEXT | PER_1M_TOKENS | $12.00 |
| CHAT_COMPLETIONS | CACHE_STORAGE | PER_1M_TOKEN_HOURS | $4.50 |
| CHAT_COMPLETIONS | TOOL_CALL | PER_1K_CALLS | $14.00 |
| RESPONSES | INPUT_TEXT | PER_1M_TOKENS | $2.00 |
| RESPONSES | OUTPUT_TEXT | PER_1M_TOKENS | $12.00 |
| RESPONSES | CACHE_STORAGE | PER_1M_TOKEN_HOURS | $4.50 |
| RESPONSES | TOOL_CALL | PER_1K_CALLS | $14.00 |
Example usage
With existing OpenAI SDK flows, change only the base URL and model identifier.
curl https://llmtr.com/v1/chat/completions -H "Authorization: Bearer llmtr-your_key" -H "Content-Type: application/json" -d '{"model":"google/gemini-3.1-pro-preview","messages":[{"role":"user","content":"Hello"}]}'Guides about this model
- Gemini Flash or Pro: Which Model Fits Your Workload? - Gemini Flash is the economical default for high-volume and tool-using work; Gemini Pro targets harder reasoning. Compare prices, thinking levels, retirement dates, and a 20-50-prompt routing test.
- Gemini 3.1 Pro vs 3.7 Flash for Coding Guide - Use Gemini 3.7 Flash for coding edits, tests, refactors and agent loops, then route tasks that fail your test set to Gemini 3.1 Pro Preview. Compare context, output limits, supported tools and session costs through one OpenAI-compatible API.
- An LLMTR model provider for Codex CLI and its Responses-only constraint - Codex CLI now speaks only the Responses protocol, so the model you pick on LLMTR must carry a Responses binding as well. The provider table, model choice and error triage all follow from that one constraint.
- Hermes Agent LLMTR plugin: profile fields and install - Hermes Agent keeps third-party providers out of the core tree and in a plugin directory. The LLMTR profile is a declarative ProviderProfile with no custom transport hooks; this guide covers its fields and its lifecycle.
Related models
- Gemini 4 Argon google/gemini-4-argon
- Gemini 3.8 Flash google/gemini-3.8-flash
- Gemini 3.7 Flash google/gemini-3.7-flash
- Gemini Deep Research google/deep-research-preview-04-2026
- Gemini 2.5 Flash Image google/gemini-2.5-flash-image
- Gemini 2.5 Flash Native Audio (Live API) google/gemini-2.5-flash-native-audio-preview-12-2025
- Gemini 2.5 Flash Preview TTS google/gemini-2.5-flash-preview-tts
- Gemini 2.5 Pro Preview TTS google/gemini-2.5-pro-preview-tts