Gemini 2.5 Pro Preview 05-06 vs GPT-4o Search Preview
Gemini 2.5 Pro Preview 05-06 (2025) and GPT-4o Search Preview (2025) are compact production models from Google DeepMind and OpenAI. Gemini 2.5 Pro Preview 05-06 ships a 1m-token context window, while GPT-4o Search Preview ships a 128k-token context window. On pricing, Gemini 2.5 Pro Preview 05-06 costs $1.25/1M input tokens versus $2.50/1M for the alternative. 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 05-06 is ~100% cheaper at $1.25/1M; pay for GPT-4o Search Preview only for provider fit.
Decision scorecard
Local evidence first| Signal | Gemini 2.5 Pro Preview 05-06 | GPT-4o Search Preview |
|---|---|---|
| Best for | multimodal apps and long-context analysis | general production evaluation |
| Decision fit | RAG, Long context, and Vision | RAG, Long context, and Classification |
| Context window | 1m | 128k |
| Cheapest output | $10/1M tokens | $10/1M tokens |
| Provider routes | 1 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Gemini 2.5 Pro Preview 05-06 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini 2.5 Pro Preview 05-06 uniquely exposes Vision and Multimodal in local model data.
- Local decision data tags Gemini 2.5 Pro Preview 05-06 for RAG, Long context, and Vision.
- Local decision data tags GPT-4o Search Preview for RAG, Long context, and Classification.
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 05-06
$3,500
Cheapest tracked route/tier: OpenRouter
GPT-4o Search Preview
$4,500
Cheapest tracked route/tier: OpenRouter
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.
- Check replacement coverage for Vision and Multimodal before moving production traffic.
- 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.
- Gemini 2.5 Pro Preview 05-06 adds Vision and Multimodal in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-05-06 | 2025-02-26 |
| Context window | 1m | 128k |
| Parameters | — | — |
| Architecture | Decoder Only | Decoder Only |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | 2025-01 | 2023-10 |
Pricing and availability
| Pricing attribute | Gemini 2.5 Pro Preview 05-06 | GPT-4o Search Preview |
|---|---|---|
| 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 05-06 | GPT-4o Search Preview |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | No | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | Yes | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
Deep dive
The capability footprint differs most on vision: Gemini 2.5 Pro Preview 05-06 and multimodal input: Gemini 2.5 Pro Preview 05-06. Both models share structured outputs, 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 2.5 Pro Preview 05-06 lists $1.25/1M input and $10/1M output tokens on the cheapest tracked provider, while GPT-4o Search Preview 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 05-06 lower by about $0.88 per million blended tokens. Availability is 1 providers versus 1, so concentration risk also matters.
Choose Gemini 2.5 Pro Preview 05-06 when long-context analysis, larger context windows, and lower input-token cost are central to the workload. Choose GPT-4o Search Preview when provider fit 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 2.5 Pro Preview 05-06 or GPT-4o Search Preview?
Gemini 2.5 Pro Preview 05-06 supports 1m tokens, while GPT-4o Search Preview 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 05-06 or GPT-4o Search Preview?
Gemini 2.5 Pro Preview 05-06 is cheaper on tracked token pricing. Gemini 2.5 Pro Preview 05-06 costs $1.25/1M input and $10/1M output tokens. GPT-4o Search Preview 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 05-06 or GPT-4o Search Preview open source?
Gemini 2.5 Pro Preview 05-06 is listed under Proprietary. GPT-4o Search Preview 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 05-06 or GPT-4o Search Preview?
Gemini 2.5 Pro Preview 05-06 has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for multimodal input, Gemini 2.5 Pro Preview 05-06 or GPT-4o Search Preview?
Gemini 2.5 Pro Preview 05-06 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.
Where can I run Gemini 2.5 Pro Preview 05-06 and GPT-4o Search Preview?
Gemini 2.5 Pro Preview 05-06 is available on OpenRouter. GPT-4o Search Preview is available on OpenRouter. Provider coverage can affect latency, region availability, compliance posture, and fallback options. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Continue comparing
Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.