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Anthropic: Claude Opus 4.1

by Anthropic

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 in multi-file code refactoring, debugging precision, and detail-oriented reasoning. The model supports extended thinking up to 64K tokens and is optimized for tasks involving research, data analysis, and tool-assisted reasoning.

Avg Score

82.1%

14 answers

Avg Latency

79.9s

10 runs

Pricing

$15.00

input

/

$75.00

output

per 1M tokens

Context

200K

tokens

Alternatives

Models with similar or better quality but different tradeoffs

No alternatives found

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Other Models from Anthropic

Compare performance with other models from the same creator

ModelScoreLatencyCost/1M
Anthropic: Claude 3.7 Sonnet95.7%44.5s$9.00
Anthropic: Claude Opus 491.8%60.9s$45.00
Anthropic: Claude 3.7 Sonnet86.1%16.3s$9.00
Anthropic: Claude Opus 4.585.3%28.8s$15.00
Anthropic: Claude Sonnet 484.0%31.0s$9.00
Anthropic: Claude 3.5 Sonnet82.9%17.7s$18.00
Anthropic: Claude Sonnet 4.582.4%20.5s$9.00
Anthropic: Claude Haiku 4.580.0%11.3s$3.00
Anthropic: Claude 3.5 Haiku72.6%7.5s$2.40
Anthropic: Claude 3 Haiku63.3%3.4s$0.75
Anthropic: Claude 3.5 Haiku (2024-10-22)——$2.40

Benchmark Performance

How this model performs across different benchmarks

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Price vs Performance

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Current model (baseline)
Other models (relative score)
Y-axis shows score difference from shared benchmarks. X-axis uses log scale.

Score Over Time

Performance trends across all benchmark runs

Benchmark Activity

Number of benchmark runs over time

Quickstart

Get started with this model using OpenRouter

View on OpenRouter
import { OpenRouter } from "@openrouter/sdk";

const openrouter = new OpenRouter({
  apiKey: "<OPENROUTER_API_KEY>"
});

const completion = await openrouter.chat.completions.create({
  model: "anthropic/claude-opus-4.1",
  messages: [
    {
      role: "user",
      content: "Hello!"
    }
  ]
});

console.log(completion.choices[0].message.content);

Get your API key at openrouter.ai/keys