Claude Sonnet 4.5 vs Qwen3.6 Max Preview
Claude Sonnet 4.5 (2025) and Qwen3.6 Max Preview (2026) are frontier-tier reasoning models from Anthropic and Alibaba. Claude Sonnet 4.5 ships a 200k-token context window, while Qwen3.6 Max Preview ships a 256k-token context window. On MMLU PRO, Qwen3.6 Max Preview leads by 2.5 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Qwen3.6 Max Preview is safer overall; choose Claude Sonnet 4.5 when vision-heavy evaluation matters.
Decision scorecard
Local evidence first| Signal | Claude Sonnet 4.5 | Qwen3.6 Max Preview |
|---|---|---|
| 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 | 200k | 256k |
| Cheapest output | $15/1M tokens | $6.24/1M tokens |
| Provider routes | 8 tracked | 3 tracked |
| Shared benchmarks | 4 shared | MMLU PRO leader |
Decision tradeoffs
- Claude Sonnet 4.5 has broader tracked provider coverage for fallback and route flexibility.
- Local decision data tags Claude Sonnet 4.5 for Coding, RAG, and Agents.
- Qwen3.6 Max Preview holds a shared-benchmark lead on MMLU PRO, ahead by 2.5 points.
- Qwen3.6 Max Preview has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Qwen3.6 Max Preview has the lower cheapest tracked output price at $6.24/1M tokens.
- Local decision data tags Qwen3.6 Max Preview 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 4.5
$6,150
Cheapest tracked route/tier: Microsoft Foundry
Qwen3.6 Max Preview
$2,392
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $3,758. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
- Qwen3.6 Max Preview is $8.76/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
- Claude Sonnet 4.5 is $8.76/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-09-29 | 2026-04-20 |
| Context window | 200k | 256k |
| Parameters | — | — |
| Architecture | Decoder Only | Mixture of Experts |
| License | Proprietary | Apache 2.0OSI-approved |
| Openness | Proprietary | Open source |
| Weights | Not released | Unknown |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: permitted |
| Knowledge cutoff | 2025-12 | - |
Pricing and availability
| Pricing attribute | Claude Sonnet 4.5 | Qwen3.6 Max Preview |
|---|---|---|
| Input price |
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| Output price |
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| Providers |
Capabilities
| Capability | Claude Sonnet 4.5 | Qwen3.6 Max Preview |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Claude Sonnet 4.5 | Qwen3.6 Max Preview |
|---|---|---|
| MMLU PRO | 86.0 | 88.5 |
| SWE-bench Verified | 77.2 | 78.8 |
| Google-Proof Q&A | 83.4 | 86.0 |
| Massive Multi-discipline Multimodal Understanding | 77.8 | 82.0 |
Continue comparing
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- Claude Sonnet 4.5 vs DeepSeek V4 Pro
- Claude Sonnet 4.5 vs DeepSeek V4 Flash
- Claude Opus 4.7 vs Claude Sonnet 4.5
- Claude Sonnet 4.5 vs Kimi K2.6
- Claude Sonnet 4.5 vs GPT-5.5
- Qwen3.6-35B-A3B vs Qwen3.6 Max Preview
- Claude Sonnet 4.5 vs GLM-5
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Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.