Claude Opus 5.5 vs Devstral Small 1.1
Claude Opus 5.5 leads the LLM Stats Score 59.7 to 9.3. Devstral Small 1.1 is 53.3x cheaper per token.
Anthropic · Mistral AI · Updated for 2026
Which is better?
Claude Opus 5.5 leads the overall LLM Stats Score 59.7 to 9.3, ranking #1 overall.
On price, Devstral Small 1.1 is roughly 53.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Claude Opus 5.5 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude Opus 5.5
- overall performance matters — it scores 59.7 and ranks #1 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped Sep 2026
Choose Devstral Small 1.1
- cost matters — it's about 53.3x cheaper per token
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Individual benchmarks
31 reported for Claude Opus 5.5 · 1 for Devstral Small 1.1
Claude Opus 5.5 and Devstral Small 1.1don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Opus 5.5 ($4.00/1M tokens) is 40.0x more expensive than Devstral Small 1.1 ($0.10/1M tokens).
For output processing, Claude Opus 5.5 ($20.00/1M tokens) is 66.7x more expensive than Devstral Small 1.1 ($0.30/1M tokens).
In conclusion, Claude Opus 5.5 is more expensive than Devstral Small 1.1.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Claude Opus 5.5 accepts 1,000,000 input tokens compared to Devstral Small 1.1's 128,000 tokens. Both models can generate responses up to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Claude Opus 5.5 supports multimodal inputs, whereas Devstral Small 1.1 does not.
Claude Opus 5.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Claude Opus 5.5
Devstral Small 1.1
License
Usage and distribution terms
Claude Opus 5.5 is licensed under a proprietary license, while Devstral Small 1.1 uses Apache 2.0.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Apache 2.0
Open weights
Release Timeline
When each model was launched
Claude Opus 5.5 was released on 2026-09-22, while Devstral Small 1.1 was released on 2025-07-11.
Claude Opus 5.5 is 15 months newer than Devstral Small 1.1.
Sep 22, 2026
0 days ago
1.2yr newerJul 11, 2025
1.2 years ago
Knowledge Cutoff
When training data ends
Claude Opus 5.5 has a documented knowledge cutoff of 2026-06-01, while Devstral Small 1.1's cutoff date is not specified.
We can confirm Claude Opus 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without Devstral Small 1.1's cutoff date.
Jun 2026
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Provider Availability
Claude Opus 5.5 is available from Anthropic. Devstral Small 1.1 is available from Mistral AI.
Claude Opus 5.5
Devstral Small 1.1
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Opus 5.5 and Devstral Small 1.1 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Opus 5.5 vs Devstral Small 1.1.