Compare AI models
| Specifications | ||
ParametersThe learned values that shape how a model responds. B means billion and T means trillion. For mixture-of-experts models, the total count is larger than the number active for each token. Parameter count alone does not measure quality. | 397B | — |
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider. | 1M | 2M |
| 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 | — |
Cheapest inputLowest input rate across every provider on OpenRouter, the lab included. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | $0.26Alibaba | — |
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input. | $1.56Alibaba | — |
| $130Alibaba | — | |
| Overview | ||
| Company | Qwen | SpaceXSI |
| Release date | Feb 16 2026 | Sep 19 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Qwen3.5-PlusvsClaude Haiku 5.5Grok 4 FastvsClaude Haiku 5.5Qwen3.5-PlusvsGPT-6.1 SolGrok 4 FastvsGPT-6.1 SolQwen3.5-PlusvsGemini 4 ArgonGrok 4 FastvsGemini 4 ArgonQwen3.5-PlusvsMuse Spark OpenGrok 4 FastvsMuse Spark OpenQwen3.5-PlusvsDeepSeek-V4.1-Flash-1017Grok 4 FastvsDeepSeek-V4.1-Flash-1017Qwen3.5-PlusvsMistral Large 4Grok 4 FastvsMistral Large 4Frequently asked questions
Qwen3.5-Plus and Grok 4 Fast 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 Grok 4 Fast. Grok 4 Fast shipped 150 days before Qwen3.5-Plus, so benchmark comparisons should account for the intervening progress.
Context windows are 1M (Qwen3.5-Plus) vs 2M (Grok 4 Fast).
Direct benchmark comparisons are unavailable — Qwen3.5-Plus and Grok 4 Fast don't publish scores on any of the same benchmarks.