Claude 3.7 Sonnet vs Claude Opus 4.1
Claude Opus 4.1 shows notably better performance in the majority of benchmarks. Claude 3.7 Sonnet is 5.0x cheaper per token.
Anthropic · Anthropic · Updated for 2026
Which is better?
Claude 3.7 Sonnet outperforms in 2 benchmarks (GPQA, TAU-bench Airline), while Claude Opus 4.1 is better at 5 benchmarks (AIME 2025, MMMLU, SWE-Bench Verified, TAU-bench Retail, Terminal-Bench). Claude Opus 4.1 shows notably better performance in the majority of benchmarks.
On price, Claude 3.7 Sonnet is roughly 5.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current benchmark, pricing, and model metadata for 2026.
Choose Claude 3.7 Sonnet
- cost matters — it's about 5.0x cheaper per token
Choose Claude Opus 4.1
- you want the strongest raw capability — it leads on 5 of 7 shared benchmarks
- you want the most recent training data — it shipped Aug 2025
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Claude 3.7 Sonnet outperforms in 2 benchmarks (GPQA, TAU-bench Airline), while Claude Opus 4.1 is better at 5 benchmarks (AIME 2025, MMMLU, SWE-Bench Verified, TAU-bench Retail, Terminal-Bench).
Claude Opus 4.1 shows notably better performance in the majority of benchmarks.
Arena Performance
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude 3.7 Sonnet ($3.00/1M tokens) is 5.0x cheaper than Claude Opus 4.1 ($15.00/1M tokens).
For output processing, Claude 3.7 Sonnet ($15.00/1M tokens) is 5.0x cheaper than Claude Opus 4.1 ($75.00/1M tokens).
In conclusion, Claude Opus 4.1 is more expensive than Claude 3.7 Sonnet.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 200,000 tokens. Claude 3.7 Sonnet can generate longer responses up to 128,000 tokens, while Claude Opus 4.1 is limited to 32,000 tokens.
Input Capabilities
Supported data types and modalities
Both Claude 3.7 Sonnet and Claude Opus 4.1 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude 3.7 Sonnet
Claude Opus 4.1
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude 3.7 Sonnet was released on 2025-02-24, while Claude Opus 4.1 was released on 2025-08-05.
Claude Opus 4.1 is 5 months newer than Claude 3.7 Sonnet.
Feb 24, 2025
1.5 years ago
Aug 5, 2025
1.1 years ago
5mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Claude 3.7 Sonnet is available from Anthropic, Bedrock, Google. Claude Opus 4.1 is available from Anthropic, Bedrock, Google.
Claude 3.7 Sonnet
Claude Opus 4.1
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude 3.7 Sonnet and Claude Opus 4.1 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude 3.7 Sonnet vs Claude Opus 4.1.