Claude Sonnet 4.6 vs Gemini 2.5 Pro
Claude Sonnet 4.6 (2026) and Gemini 2.5 Pro (2025) are frontier-tier reasoning models from Anthropic and Google DeepMind. Claude Sonnet 4.6 ships a 1m-token context window, while Gemini 2.5 Pro ships a 1m-token context window. On MMLU PRO, Claude Sonnet 4.6 leads by 1.1 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Claude Sonnet 4.6 is safer overall; choose Gemini 2.5 Pro when coding workflow support matters.
Decision scorecard
Local evidence first| Signal | Claude Sonnet 4.6 | Gemini 2.5 Pro |
|---|---|---|
| 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 | 1m |
| Cheapest output | $15/1M tokens | $10/1M tokens |
| Provider routes | 6 tracked | 4 tracked |
| Shared benchmarks | MMLU PRO leader | 10 shared |
Decision tradeoffs
- Claude Sonnet 4.6 holds a shared-benchmark lead on MMLU PRO, ahead by 1.1 points.
- Claude Sonnet 4.6 has broader tracked provider coverage for fallback and route flexibility.
- Claude Sonnet 4.6 uniquely exposes Computer use and Parallel agents in local model data.
- Local decision data tags Claude Sonnet 4.6 for Coding, RAG, and Agents.
- Gemini 2.5 Pro has the lower cheapest tracked output price at $10/1M tokens.
- Local decision data tags Gemini 2.5 Pro 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.
Claude Sonnet 4.6
$6,150
Cheapest tracked route/tier: OpenRouter
Gemini 2.5 Pro
$3,500
Cheapest tracked route/tier: Google AI Studio <=200K tokens
Estimated monthly gap: $2,650. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on GCP Vertex AI, OpenRouter, and Vercel AI Gateway; start route-level A/B tests there.
- Gemini 2.5 Pro is $5/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Computer use and Parallel agents before moving production traffic.
- Provider overlap exists on OpenRouter, GCP Vertex AI, and Vercel AI Gateway; start route-level A/B tests there.
- Claude Sonnet 4.6 is $5/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Claude Sonnet 4.6 adds Computer use and Parallel agents in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-02-17 | 2025-06-17 |
| Context window | 1m | 1m |
| 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 | 2025-08 | 2025-01 |
Pricing and availability
| Pricing attribute | Claude Sonnet 4.6 | Gemini 2.5 Pro |
|---|---|---|
| Input price | $3/1M tokens |
|
| Output price | $15/1M tokens |
|
| Providers |
Capabilities
| Capability | Claude Sonnet 4.6 | Gemini 2.5 Pro |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | Yes |
| IDE integration | No | No |
| Computer use | Yes | No |
| Parallel agents | Yes | No |
Benchmarks
| Benchmark | Claude Sonnet 4.6 | Gemini 2.5 Pro |
|---|---|---|
| MMLU PRO | 87.3 | 86.2 |
| SWE-bench Verified | 79.6 | 63.8 |
| Google-Proof Q&A | 89.9 | 86.4 |
| AIME 2025 | 94.0 | 86.7 |
| LiveCodeBench | 80.0 | 75.6 |
| Massive Multi-discipline Multimodal Understanding | 83.6 | 81.7 |
| Humanity's Last Exam | 33.2 | 18.8 |
| HumanEval | 98.0 | 93.1 |
| Chatbot Arena | 1459.0 | 1398.0 |
| Terminal-Bench 2.0 | 59.1 | 32.6 |
Continue comparing
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- Claude Sonnet 4.6 vs DeepSeek V4 Pro
- Gemini 2.5 Pro vs Grok 4
- Claude Sonnet 4.6 vs Kimi K2.6
- Claude Sonnet 4.6 vs Composer 2.5
- Claude Sonnet 4.6 vs GPT-5.5 Pro
- Gemini 2.5 Pro vs o3
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Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.