Gemini 2.5 Pro Preview 05-06 vs Grok 4
Gemini 2.5 Pro Preview 05-06 (2025) and Grok 4 (2025) are frontier reasoning models from Google DeepMind and xAI. Gemini 2.5 Pro Preview 05-06 ships a 1m-token context window, while Grok 4 ships a 256k-token context window. On pricing, both list $1.25/1M input tokens on the cheapest tracked route. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Grok 4 is safer overall; choose Gemini 2.5 Pro Preview 05-06 when long-context analysis matters.
Decision scorecard
Local evidence first| Signal | Gemini 2.5 Pro Preview 05-06 | Grok 4 |
|---|---|---|
| Best for | multimodal apps and long-context analysis | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | RAG, Long context, and Vision | Coding, RAG, and Agents |
| Context window | 1m | 256k |
| Cheapest output | $10/1M tokens | $2.50/1M tokens |
| Provider routes | 1 tracked | 4 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.
- Local decision data tags Gemini 2.5 Pro Preview 05-06 for RAG, Long context, and Vision.
- Grok 4 has the lower cheapest tracked output price at $2.50/1M tokens.
- Grok 4 has broader tracked provider coverage for fallback and route flexibility.
- Grok 4 uniquely exposes Reasoning, JSON / Tool use, and Code execution in local model data.
- Local decision data tags Grok 4 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 05-06
$3,500
Cheapest tracked route/tier: OpenRouter
Grok 4
$1,625
Cheapest tracked route/tier: xAI Console
Estimated monthly gap: $1,875. 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.
- Grok 4 is $7.50/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Grok 4 adds Reasoning, JSON / Tool use, and Code execution in local capability data.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Gemini 2.5 Pro Preview 05-06 is $7.50/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Reasoning, JSON / Tool use, and Code execution before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-05-06 | 2025-07-09 |
| Context window | 1m | 256k |
| 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 | - |
Pricing and availability
| Pricing attribute | Gemini 2.5 Pro Preview 05-06 | Grok 4 |
|---|---|---|
| Input price | $1.25/1M tokens | $1.25/1M tokens |
| Output price | $10/1M tokens | $2.50/1M tokens |
| Providers |
Capabilities
| Capability | Gemini 2.5 Pro Preview 05-06 | Grok 4 |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | No | Yes |
| JSON / Tool use | No | Yes |
| Structured outputs | Yes | Yes |
| Code execution | No | Yes |
| 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: 2026-07-10. Data sourced from public model cards and provider documentation.