Gemini 2.5 Pro vs Grok-3
Gemini 2.5 Pro (2025) and Grok-3 (2025) are frontier-tier reasoning models from Google DeepMind and xAI. Gemini 2.5 Pro ships a 1m-token context window, while Grok-3 ships a 131k-token context window. On MMLU PRO, Gemini 2.5 Pro leads by 6.3 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 fits 8x more tokens; pick it for long-context work and Grok-3 for tighter calls.
Decision scorecard
Local evidence first| Signal | Gemini 2.5 Pro | Grok-3 |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 1m | 131k |
| Cheapest output | $10/1M tokens | $2.40/1M tokens |
| Provider routes | 4 tracked | 4 tracked |
| Shared benchmarks | MMLU PRO leader | 8 shared |
Decision tradeoffs
- Gemini 2.5 Pro holds a shared-benchmark lead on MMLU PRO, ahead by 6.3 points.
- Gemini 2.5 Pro has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini 2.5 Pro uniquely exposes Code execution in local model data.
- Local decision data tags Gemini 2.5 Pro for Coding, RAG, and Agents.
- Grok-3 holds a shared-benchmark lead on AIME 2025, ahead by 6.6 points.
- Grok-3 has the lower cheapest tracked output price at $2.40/1M tokens.
- Local decision data tags Grok-3 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
$3,500
Cheapest tracked route/tier: Google AI Studio <=200K tokens
Grok-3
$1,240
Cheapest tracked route/tier: Chutes AI
Estimated monthly gap: $2,260. 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-3 is $7.60/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Code execution before moving production traffic.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Gemini 2.5 Pro is $7.60/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Gemini 2.5 Pro adds Code execution in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-06-17 | 2025-02-17 |
| Context window | 1m | 131k |
| Parameters | — | — |
| Architecture | 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 | 2025-04 |
Pricing and availability
| Pricing attribute | Gemini 2.5 Pro | Grok-3 |
|---|---|---|
| Input price |
| $0.80/1M tokens |
| Output price |
| $2.40/1M tokens |
| Providers |
Capabilities
| Capability | Gemini 2.5 Pro | Grok-3 |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Gemini 2.5 Pro | Grok-3 |
|---|---|---|
| MMLU PRO | 86.2 | 79.9 |
| Google-Proof Q&A | 86.4 | 84.6 |
| AIME 2025 | 86.7 | 93.3 |
| LiveCodeBench | 75.6 | 79.4 |
| Massive Multi-discipline Multimodal Understanding | 81.7 | 78.0 |
| HumanEval | 93.1 | 94.5 |
| Aider Polyglot | 83.1 | 53.3 |
| Chatbot Arena | 1398.0 | 1405.0 |
Continue comparing
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Last reviewed: 2026-07-10. Data sourced from public model cards and provider documentation.