Gemini 3.1 Pro vs GPT-4o (11-20)
Gemini 3.1 Pro (2026) and GPT-4o (11-20) (2024) are compact production models from Google DeepMind and OpenAI. Gemini 3.1 Pro ships a 1M-token context window, while GPT-4o (11-20) ships a 128K-token context window. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing. The goal is to make the tradeoff clear before deeper testing.
Gemini 3.1 Pro fits 8x more tokens; pick it for long-context work and GPT-4o (11-20) for tighter calls.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-02-19 | 2024-11-20 |
| Context window | 1M | 128K |
| Parameters | — | 1.76T (8x222B MoE)* |
| Architecture | decoder only | mixture of experts |
| License | Proprietary | Proprietary |
| Knowledge cutoff | 2025-01 | 2023-10 |
Pricing and availability
| Pricing attribute | Gemini 3.1 Pro | GPT-4o (11-20) |
|---|---|---|
| Input price | $1.25/1M tokens | - |
| Output price | $10/1M tokens | - |
| Providers | - |
Capabilities
| Capability | Gemini 3.1 Pro | GPT-4o (11-20) |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | No |
| Reasoning | No | No |
| Function calling | Yes | No |
| Tool use | Yes | No |
| Structured outputs | No | No |
| Code execution | Yes | Yes |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on multimodal input: Gemini 3.1 Pro, function calling: Gemini 3.1 Pro, and tool use: Gemini 3.1 Pro. Both models share vision and code execution, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
Pricing coverage is uneven: Gemini 3.1 Pro has $1.25/1M input tokens and GPT-4o (11-20) has no token price sourced yet. Provider availability is 2 tracked routes versus 0. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Gemini 3.1 Pro when coding workflow support, larger context windows, and broader provider choice are central to the workload. Choose GPT-4o (11-20) when coding workflow support are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which has a larger context window, Gemini 3.1 Pro or GPT-4o (11-20)?
Gemini 3.1 Pro supports 1M tokens, while GPT-4o (11-20) supports 128K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Gemini 3.1 Pro or GPT-4o (11-20) open source?
Gemini 3.1 Pro is listed under Proprietary. GPT-4o (11-20) is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Gemini 3.1 Pro or GPT-4o (11-20)?
Both Gemini 3.1 Pro and GPT-4o (11-20) expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, Gemini 3.1 Pro or GPT-4o (11-20)?
Gemini 3.1 Pro has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for function calling, Gemini 3.1 Pro or GPT-4o (11-20)?
Gemini 3.1 Pro has the clearer documented function calling signal in this comparison. If function calling is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Gemini 3.1 Pro and GPT-4o (11-20)?
Gemini 3.1 Pro is available on Google AI Studio and Replicate API. GPT-4o (11-20) is available on the tracked providers still being sourced. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-05-11. Data sourced from public model cards and provider documentation.