Claude Mythos Preview vs Qwen3-Max
Claude Mythos Preview (2026) and Qwen3-Max (2025) are frontier reasoning models from Anthropic and Alibaba. Claude Mythos Preview ships a 1m-token context window, while Qwen3-Max ships a 262k-token context window. On SWE-bench Verified, Claude Mythos Preview leads by 15.1 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Claude Mythos Preview is safer overall; choose Qwen3-Max when vision-heavy evaluation matters.
Decision scorecard
Local evidence first| Signal | Claude Mythos Preview | Qwen3-Max |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | multimodal apps, tool-calling agents, and provider-routed production |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 1m | 262k |
| Cheapest output | $125/1M tokens | $3.90/1M tokens |
| Provider routes | 2 tracked | 3 tracked |
| Shared benchmarks | SWE-bench Verified leader | 2 shared |
Decision tradeoffs
- Claude Mythos Preview holds a shared-benchmark lead on SWE-bench Verified, ahead by 15.1 points.
- Claude Mythos Preview has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Claude Mythos Preview uniquely exposes Reasoning and Code execution in local model data.
- Local decision data tags Claude Mythos Preview for Coding, RAG, and Agents.
- Qwen3-Max has the lower cheapest tracked output price at $3.90/1M tokens.
- Qwen3-Max has broader tracked provider coverage for fallback and route flexibility.
- Local decision data tags Qwen3-Max 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 Mythos Preview
$51,250
Cheapest tracked route/tier: Anthropic
Qwen3-Max
$1,599
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $49,651. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Claude Mythos Preview and Qwen3-Max; plan for SDK, billing, or endpoint changes.
- Qwen3-Max is $121/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Reasoning and Code execution before moving production traffic.
- No overlapping tracked provider route is sourced for Qwen3-Max and Claude Mythos Preview; plan for SDK, billing, or endpoint changes.
- Claude Mythos Preview is $121/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Claude Mythos Preview adds Reasoning and Code execution in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-05-01 | 2025-04-28 |
| Context window | 1m | 262k |
| Parameters | — | — |
| Architecture | Decoder Only | Decoder Only |
| 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 | 2025-12 |
Pricing and availability
| Pricing attribute | Claude Mythos Preview | Qwen3-Max |
|---|---|---|
| Input price | $25/1M tokens |
|
| Output price | $125/1M tokens |
|
| Providers |
Capabilities
| Capability | Claude Mythos Preview | Qwen3-Max |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | No |
| 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 | Claude Mythos Preview | Qwen3-Max |
|---|---|---|
| SWE-bench Verified | 93.9 | 78.8 |
| τ-bench | 89.2 | 76.8 |
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Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.