Claude 2.1vsQwen3.5-Plus
Claude 2.1 | Qwen3.5-Plus | |
|---|---|---|
| Specifications | ||
Context windowHow much text the model can hold in mind at once — your question, any documents you attach, the conversation so far, and its own reply. Go past it and the earliest part falls out of view. | 200k | 1M |
| API pricingUSD per 1M tokens · lower wins · base tier | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | — | $0.40 |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | — | $2.40 |
| Overview | ||
| Company | Anthropic | Qwen |
| Release date | Nov 21 2023 | Feb 16 2026 |
| Access | Proprietary | Proprietary |
Frequently asked questions
Claude 2.1 and Qwen3.5-Plus don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Only Qwen3.5-Plus has a verified first-party API price: $0.40 per million input tokens and $2.40 per million output tokens. No pay-as-you-go API rate is tracked for Claude 2.1. Claude 2.1 shipped 818 days before Qwen3.5-Plus, so benchmark comparisons should account for the intervening progress.
Context windows are 200k (Claude 2.1) vs 1M (Qwen3.5-Plus).
Direct benchmark comparisons are unavailable — Claude 2.1 and Qwen3.5-Plus don't publish scores on any of the same benchmarks.
Claude 2.1 was released by Anthropic on Nov 21 2023.
Qwen3.5-Plus was released by Qwen on Feb 16 2026.
Only Qwen3.5-Plus has a verified first-party API price: $0.40 per million input tokens and $2.40 per million output tokens. No pay-as-you-go API rate is tracked for Claude 2.1. Rates are pay-as-you-go API prices verified on August 18, 2026.
Claude 2.1 has a 200k context window; Qwen3.5-Plus has 1M.