Gemini 2.5 Pro Preview 06-05 vs GPT-4o (08-06)
Gemini 2.5 Pro Preview 06-05 (2025) and GPT-4o (08-06) (2024) are compact production models from Google DeepMind and OpenAI. Gemini 2.5 Pro Preview 06-05 ships a 1m-token context window, while GPT-4o (08-06) ships a 128k-token context window. On Aider Polyglot, Gemini 2.5 Pro Preview 06-05 leads by 56.0 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Gemini 2.5 Pro Preview 06-05 is ~100% cheaper at $1.25/1M; pay for GPT-4o (08-06) only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Gemini 2.5 Pro Preview 06-05 | GPT-4o (08-06) |
|---|---|---|
| Best for | multimodal apps and long-context analysis | multimodal apps and provider-routed production |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 1m | 128k |
| Cheapest output | $10/1M tokens | $10/1M tokens |
| Provider routes | 1 tracked | 3 tracked |
| Shared benchmarks | Aider Polyglot leader | 1 shared |
Decision tradeoffs
- Gemini 2.5 Pro Preview 06-05 holds a shared-benchmark lead on Aider Polyglot, ahead by 56.0 points.
- Gemini 2.5 Pro Preview 06-05 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Local decision data tags Gemini 2.5 Pro Preview 06-05 for Coding, RAG, and Agents.
- GPT-4o (08-06) has broader tracked provider coverage for fallback and procurement flexibility.
- Local decision data tags GPT-4o (08-06) for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Gemini 2.5 Pro Preview 06-05
$3,500
Cheapest tracked route/tier: OpenRouter
GPT-4o (08-06)
$4,500
Cheapest tracked route/tier: OpenAI API
Estimated monthly gap: $1,000. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Cheapest tracked output pricing is tied, so migration risk shifts to quality, latency, and provider packaging.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Cheapest tracked output pricing is tied, so migration risk shifts to quality, latency, and provider packaging.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-03-25 | 2024-08-06 |
| Context window | 1m | 128k |
| Parameters | — | 1.76T (8x222B MoE)* |
| Architecture | Decoder Only | Mixture of Experts |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | - | 2023-10 |
Pricing and availability
| Pricing attribute | Gemini 2.5 Pro Preview 06-05 | GPT-4o (08-06) |
|---|---|---|
| Input price | $1.25/1M tokens | $2.50/1M tokens |
| Output price | $10/1M tokens | $10/1M tokens |
| Providers |
Capabilities
| Capability | Gemini 2.5 Pro Preview 06-05 | GPT-4o (08-06) |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | No | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | Yes | Yes |
| Code execution | Yes | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Gemini 2.5 Pro Preview 06-05 | GPT-4o (08-06) |
|---|---|---|
| Aider Polyglot | 79.1 | 23.1 |
Deep dive
On shared benchmark coverage, Aider Polyglot has Gemini 2.5 Pro Preview 06-05 at 79.1 and GPT-4o (08-06) at 23.1, with Gemini 2.5 Pro Preview 06-05 ahead by 56.0 points. The largest visible gap is 56.0 points on Aider Polyglot, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint is close: both models cover vision, multimodal input, structured outputs, and code execution. That makes context budget, benchmark fit, and provider maturity more important than a simple checklist. If your application depends on one integration detail, verify it against the provider route you plan to use, not just the base model listing.
For cost, Gemini 2.5 Pro Preview 06-05 lists $1.25/1M input and $10/1M output tokens on the cheapest tracked provider, while GPT-4o (08-06) lists $2.50/1M input and $10/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Gemini 2.5 Pro Preview 06-05 lower by about $0.88 per million blended tokens. Availability is 1 providers versus 3, so concentration risk also matters.
Choose Gemini 2.5 Pro Preview 06-05 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.
FAQ
Which has a larger context window, Gemini 2.5 Pro Preview 06-05 or GPT-4o (08-06)?
Gemini 2.5 Pro Preview 06-05 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 2.5 Pro Preview 06-05 or GPT-4o (08-06)?
Gemini 2.5 Pro Preview 06-05 is cheaper on tracked token pricing. Gemini 2.5 Pro Preview 06-05 costs $1.25/1M input and $10/1M output tokens. GPT-4o (08-06) costs $2.50/1M input and $10/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Gemini 2.5 Pro Preview 06-05 or GPT-4o (08-06) open source?
Gemini 2.5 Pro Preview 06-05 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 2.5 Pro Preview 06-05 or GPT-4o (08-06)?
Both Gemini 2.5 Pro Preview 06-05 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.
Which is better for multimodal input, Gemini 2.5 Pro Preview 06-05 or GPT-4o (08-06)?
Both Gemini 2.5 Pro Preview 06-05 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 2.5 Pro Preview 06-05 and GPT-4o (08-06)?
Gemini 2.5 Pro Preview 06-05 is available on OpenRouter. 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.
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Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.