Gemini 3.1 Pro vs GPT-4o (08-06)
Gemini 3.1 Pro (2026) and GPT-4o (08-06) (2024) are compact production models from Google DeepMind and OpenAI. Gemini 3.1 Pro ships a 1M-token context window, while GPT-4o (08-06) ships a 128K-token context window. On pricing, Gemini 3.1 Pro costs $1.25/1M input tokens versus $2.5/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing.
Gemini 3.1 Pro is ~100% cheaper at $1.25/1M; pay for GPT-4o (08-06) only for coding workflow support.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-02-19 | 2024-08-06 |
| 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 (08-06) |
|---|---|---|
| Input price | $1.25/1M tokens | $2.5/1M tokens |
| Output price | $10/1M tokens | $10/1M tokens |
| Providers |
Capabilities
| Capability | Gemini 3.1 Pro | GPT-4o (08-06) |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | No | No |
| Function calling | Yes | No |
| Tool use | Yes | No |
| Structured outputs | No | Yes |
| Code execution | Yes | Yes |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on function calling: Gemini 3.1 Pro, tool use: Gemini 3.1 Pro, and structured outputs: GPT-4o (08-06). Both models share vision, multimodal input, 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.
For cost, Gemini 3.1 Pro lists $1.25/1M input and $10/1M output tokens, while GPT-4o (08-06) lists $2.5/1M input and $10/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Gemini 3.1 Pro lower by about $0.88 per million blended tokens. Availability is 2 providers versus 3, so concentration risk also matters.
Choose Gemini 3.1 Pro when coding workflow support, larger context windows, and lower input-token cost are central to the workload. Choose GPT-4o (08-06) when coding workflow support and broader provider choice 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.
FAQ
Which has a larger context window, Gemini 3.1 Pro or GPT-4o (08-06)?
Gemini 3.1 Pro supports 1M tokens, while GPT-4o (08-06) supports 128K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Gemini 3.1 Pro or GPT-4o (08-06)?
Gemini 3.1 Pro is cheaper on tracked token pricing. Gemini 3.1 Pro costs $1.25/1M input and $10/1M output tokens. GPT-4o (08-06) costs $2.5/1M input and $10/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Gemini 3.1 Pro or GPT-4o (08-06) open source?
Gemini 3.1 Pro is listed under Proprietary. GPT-4o (08-06) 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 (08-06)?
Both Gemini 3.1 Pro and GPT-4o (08-06) 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 (08-06)?
Both Gemini 3.1 Pro and GPT-4o (08-06) expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Where can I run Gemini 3.1 Pro and GPT-4o (08-06)?
Gemini 3.1 Pro is available on Google AI Studio and Replicate API. GPT-4o (08-06) is available on OpenAI API, Salesforce Einstein Generative AI, and OpenRouter. 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.