Gemini 3.1 Pro Preview Custom Tools vs GPT-4o (11-20)
Gemini 3.1 Pro Preview Custom Tools (2026) and GPT-4o (11-20) (2024) are compact production models from Google DeepMind and OpenAI. Gemini 3.1 Pro Preview Custom Tools ships a 1m-token context window, while GPT-4o (11-20) ships a 128k-token context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Gemini 3.1 Pro Preview Custom Tools fits 8x more tokens; pick it for long-context work and GPT-4o (11-20) for tighter calls.
Decision scorecard
Local evidence first| Signal | Gemini 3.1 Pro Preview Custom Tools | GPT-4o (11-20) |
|---|---|---|
| Best for | multimodal apps, long-context analysis, and provider-routed production | multimodal apps |
| Decision fit | RAG, Long context, and Vision | Coding, Agents, and Long context |
| Context window | 1m | 128k |
| Cheapest output | $12/1M tokens | - |
| Provider routes | 2 tracked | 0 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Gemini 3.1 Pro Preview Custom Tools has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini 3.1 Pro Preview Custom Tools has broader tracked provider coverage for fallback and route flexibility.
- Gemini 3.1 Pro Preview Custom Tools uniquely exposes Multimodal and Structured outputs in local model data.
- Local decision data tags Gemini 3.1 Pro Preview Custom Tools for RAG, Long context, and Vision.
- GPT-4o (11-20) uniquely exposes Code execution in local model data.
- Local decision data tags GPT-4o (11-20) for Coding, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Gemini 3.1 Pro Preview Custom Tools
$4,600
Cheapest tracked route/tier: OpenRouter
GPT-4o (11-20)
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Gemini 3.1 Pro Preview Custom Tools and GPT-4o (11-20); plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Multimodal and Structured outputs before moving production traffic.
- GPT-4o (11-20) adds Code execution in local capability data.
- No overlapping tracked provider route is sourced for GPT-4o (11-20) and Gemini 3.1 Pro Preview Custom Tools; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Code execution before moving production traffic.
- Gemini 3.1 Pro Preview Custom Tools adds Multimodal and Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-01-01 | 2024-11-20 |
| Context window | 1m | 128k |
| Parameters | — | 1.76T (8x222B MoE)* |
| Architecture | Decoder Only | Mixture of Experts |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | 2025-01 | 2023-10 |
Pricing and availability
| Pricing attribute | Gemini 3.1 Pro Preview Custom Tools | GPT-4o (11-20) |
|---|---|---|
| Input price | $2/1M tokens | - |
| Output price | $12/1M tokens | - |
| Providers | - |
Capabilities
| Capability | Gemini 3.1 Pro Preview Custom Tools | GPT-4o (11-20) |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | No |
| Reasoning | No | No |
| JSON / Tool use | No | No |
| Structured outputs | Yes | No |
| Code execution | No | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
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Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.