anthropic
Anthropic: Claude Opus 4.1
anthropic/claude-opus-4.1
Our take
AI-assisted analysis based on the sources below. Suitability is an editorial assessment; test it on your own workload.
OpenRouter’s catalog presents anthropic/claude-opus-4.1 as an updated Anthropic flagship model for coding, reasoning, and agentic tasks. The listing reports text, image, and file inputs with text output, a large context window, tool-calling controls, reasoning-related request parameters, and a January 2025 knowledge cutoff. It also reports a SWE-bench Verified result and category-specific Design Arena outcomes, but this source pack does not include an independent model card.[1]
Strengths
- The catalog describes improved coding, reasoning, and agentic-task capability relative to the prior Opus release.[1]
- It accepts text, image, and file inputs and produces text, with a large listed context window.[1]
- The API listing includes tools, tool choice, sampling controls, and reasoning-related request parameters.[1]
Limitations
- Evidence is limited to OpenRouter’s catalog; an independent model card was not available in this source pack.[1]
- Reported performance evidence is narrow and category-dependent, so results should be validated on the intended workload.[1]
- Output is listed as text only, and the stated knowledge cutoff may limit awareness of later events.[1]
Where to use it
Sources
- [1] OpenRouter catalog · Anthropic: Claude Opus 4.1Sources checked: Nov 13, 2026
About this model
Description below is the original text supplied by OpenRouter, shown in the source language.
Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...
Specifications
- Model ID
- anthropic/claude-opus-4.1
- Canonical ID
- anthropic/claude-4.1-opus-20250805
- Creator
- anthropic
- Added to OpenRouter
- 05.08.2025
- Context length
- 200,000
- Modality
- text+image+file->text
- Input modalities
- image, text, file
- Output modalities
- text
- Token pricing
- USD per 1M tokens: in $15 / out $75
- Knowledge cutoff
- 31.01.2025
- Expiration date
- —
Tasks and capabilities
A grade appears only where the source supplies a matching measurement for that task, the model is active and the cohort holds at least 10 comparable models. The capability column lists facts the source declares — supported formats, reasoning and tool parameters — which are not measured quality.
| Task | Grade | Source-declared capability |
|---|---|---|
| General quality | No measurement | reasoning: optional · parameters: include_reasoning, reasoning |
| Coding | No measurement | — |
| Agents | No measurement | parameters: tool_choice, tools |
| Writing | No measurement | output: text |
| Reasoning | No measurement | reasoning: optional · parameters: include_reasoning, reasoning |
| Document analysis | No measurement | input: file |
| Vision | No measurement | input: image |
| Image generation | No measurement | — |
| Audio | No measurement | — |
| Video | No measurement | — |
| Embeddings | No measurement | — |
Evaluations
| Source | Benchmark | Value | Grade | Data retrieved |
|---|---|---|---|---|
| Design Arena | models · 3dwin rate 51.9% · rank 75 | 1,136Elo | BB — next 30% of the cohort | 13.11.2026 |
| Design Arena | models · asciiartwin rate 51.5% · rank 34 | 1,162Elo | BB — next 30% of the cohort | 13.11.2026 |
| Design Arena | models · codecategorieswin rate 55.8% · rank 77 | 1,161Elo | BB — next 30% of the cohort | 13.11.2026 |
| Design Arena | models · datavizwin rate 56.4% · rank 76 | 1,164Elo | CC — below the B band | 13.11.2026 |
| Design Arena | models · gamedevwin rate 58.4% · rank 70 | 1,162Elo | BB — next 30% of the cohort | 13.11.2026 |
| Design Arena | models · svgwin rate 60.8% · rank 51 | 1,144Elo | BB — next 30% of the cohort | 13.11.2026 |
| Design Arena | models · uicomponentwin rate 57.8% · rank 79 | 1,155Elo | CC — below the B band | 13.11.2026 |
| Design Arena | models · websitewin rate 55.3% · rank 82 | 1,171Elo | CC — below the B band | 13.11.2026 |
How grades work
Each letter grade compares a model only against other models scored by the same source and metric in the current snapshot. S means the top 10%, A the next 20%, B the next 30%, C the rest. Models without a published measurement are shown as not rated — a supported format alone never implies measured quality.
- S — S — top 10% of the cohort
- A — A — next 20% of the cohort
- B — B — next 30% of the cohort
- C — C — below the B band
Providers
Optional live provider statistics from OpenRouter. Missing values are unknown, not zero.
| Provider | Context length | Price in /1M | Price out /1M | Latency p50 (30m, s) | Throughput p50 (30m, tok/s) | Uptime (30m) |
|---|---|---|---|---|---|---|
| Amazon Bedrock | 200,000 | $15 | $75 | — | — | 100% |
Provider data retrieved: 13.11.2026
Related articles
No published articles identify this model yet.