Gemini 2.5 Pro Preview 05-06 vs o3 Deep Research
Gemini 2.5 Pro Preview 05-06 (2025) and o3 Deep Research (2025) are frontier reasoning models from Google DeepMind and OpenAI. Gemini 2.5 Pro Preview 05-06 ships a 1m-token context window, while o3 Deep Research ships a 200k-token context window. On pricing, Gemini 2.5 Pro Preview 05-06 costs $1.25/1M input tokens versus $10/1M 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 ~700% cheaper at $1.25/1M; pay for o3 Deep Research only for reasoning depth.
Decision scorecard
Local evidence first| Signal | Gemini 2.5 Pro Preview 05-06 | o3 Deep Research |
|---|---|---|
| Best for | multimodal apps and long-context analysis | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | RAG, Long context, and Vision | RAG, Agents, and Long context |
| Context window | 1m | 200k |
| Cheapest output | $10/1M tokens | $40/1M tokens |
| Provider routes | 1 tracked | 2 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 has the lower cheapest tracked output price at $10/1M tokens.
- Local decision data tags Gemini 2.5 Pro Preview 05-06 for RAG, Long context, and Vision.
- o3 Deep Research has broader tracked provider coverage for fallback and route flexibility.
- o3 Deep Research uniquely exposes Reasoning and JSON / Tool use in local model data.
- Local decision data tags o3 Deep Research for RAG, 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 2.5 Pro Preview 05-06
$3,500
Cheapest tracked route/tier: OpenRouter
o3 Deep Research
$18,000
Cheapest tracked route/tier: Vercel AI Gateway
Estimated monthly gap: $14,500. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Gemini 2.5 Pro Preview 05-06 and o3 Deep Research; plan for SDK, billing, or endpoint changes.
- o3 Deep Research is $30/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- o3 Deep Research adds Reasoning and JSON / Tool use in local capability data.
- No overlapping tracked provider route is sourced for o3 Deep Research and Gemini 2.5 Pro Preview 05-06; plan for SDK, billing, or endpoint changes.
- Gemini 2.5 Pro Preview 05-06 is $30/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Reasoning and JSON / Tool use before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-05-06 | 2025-10-10 |
| Context window | 1m | 200k |
| Parameters | — | — |
| Architecture | Decoder Only | Decoder Only |
| 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 | 2024-06 |
Pricing and availability
| Pricing attribute | Gemini 2.5 Pro Preview 05-06 | o3 Deep Research |
|---|---|---|
| Input price | $1.25/1M tokens | $10/1M tokens |
| Output price | $10/1M tokens | $40/1M tokens |
| Providers |
Capabilities
| Capability | Gemini 2.5 Pro Preview 05-06 | o3 Deep Research |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | No | Yes |
| JSON / Tool use | No | Yes |
| 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.
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Last reviewed: 2026-06-29. Data sourced from public model cards and provider documentation.