Model Comparison

Claude Opus 4.5 vs Devstral Small 1.1Which is better in 2026?

Claude Opus 4.5 significantly outperforms across most benchmarks. Devstral Small 1.1 is 66.7x cheaper per token.

Verdict: Claude Opus 4.5 vs Devstral Small 1.1 — which is better?

Claude Opus 4.5 (by Anthropic) and Devstral Small 1.1 (by Mistral AI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude Opus 4.5 outperforms in 1 benchmarks (SWE-Bench Verified), while Devstral Small 1.1 is better at 0 benchmarks. Claude Opus 4.5 significantly outperforms across most benchmarks.

On price, Devstral Small 1.1 is roughly 66.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Opus 4.5 also accepts a larger context window (200,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude Opus 4.5 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you process long inputs — it offers a 200,000 token context window
  • you want the most recent training data — it shipped Nov 2025

Choose Devstral Small 1.1 if…

  • cost matters — it's about 66.7x cheaper per token
  • you need open weights you can self-host or fine-tune
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Opus 4.5 outperforms in 1 benchmarks (SWE-Bench Verified), while Devstral Small 1.1 is better at 0 benchmarks.

Claude Opus 4.5 significantly outperforms across most benchmarks.

Sat Jun 13 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Devstral Small 1.1 costs less

For input processing, Claude Opus 4.5 ($5.00/1M tokens) is 50.0x more expensive than Devstral Small 1.1 ($0.10/1M tokens).

For output processing, Claude Opus 4.5 ($25.00/1M tokens) is 83.3x more expensive than Devstral Small 1.1 ($0.30/1M tokens).

In conclusion, Claude Opus 4.5 is more expensive than Devstral Small 1.1.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sat Jun 13 2026 • llm-stats.com
Anthropic
Claude Opus 4.5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
Mistral AI
Devstral Small 1.1
Input tokens$0.10
Output tokens$0.30
Best providerMistral
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 4.5 accepts 200,000 input tokens compared to Devstral Small 1.1's 128,000 tokens. Devstral Small 1.1 can generate longer responses up to 128,000 tokens, while Claude Opus 4.5 is limited to 64,000 tokens.

Anthropic
Claude Opus 4.5
Input200,000 tokens
Output64,000 tokens
Mistral AI
Devstral Small 1.1
Input128,000 tokens
Output128,000 tokens
Sat Jun 13 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Opus 4.5 supports multimodal inputs, whereas Devstral Small 1.1 does not.

Claude Opus 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Opus 4.5

Text
Images
Audio
Video

Devstral Small 1.1

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 4.5 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.

Claude Opus 4.5

Proprietary

Closed source

Devstral Small 1.1

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Opus 4.5 was released on 2025-11-24, while Devstral Small 1.1 was released on 2025-07-11.

Claude Opus 4.5 is 5 months newer than Devstral Small 1.1.

Claude Opus 4.5

Nov 24, 2025

6 months ago

4mo newer
Devstral Small 1.1

Jul 11, 2025

11 months ago

Knowledge Cutoff

When training data ends

Claude Opus 4.5 has a documented knowledge cutoff of 2025-03-31, while Devstral Small 1.1's cutoff date is not specified.

We can confirm Claude Opus 4.5's training data extends to 2025-03-31, but cannot make a direct comparison without Devstral Small 1.1's cutoff date.

Claude Opus 4.5

Mar 2025

Devstral Small 1.1

—

Provider Availability

Claude Opus 4.5 is available from Anthropic. Devstral Small 1.1 is available from Mistral AI.

Claude Opus 4.5

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M

Devstral Small 1.1

mistral logo
Mistral
Input Price:Input: $0.10/1MOutput Price:Output: $0.30/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Larger context window (200,000 tokens)
Supports multimodal inputs
Higher SWE-Bench Verified score (80.9% vs 53.6%)
Mistral AI
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.5
Mistral AI
Devstral Small 1.1

FAQ

Common questions about Claude Opus 4.5 vs Devstral Small 1.1.

Which is better, Claude Opus 4.5 or Devstral Small 1.1?

Claude Opus 4.5 significantly outperforms across most benchmarks. Claude Opus 4.5 is made by Anthropic and Devstral Small 1.1 is made by Mistral AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Opus 4.5 compare to Devstral Small 1.1 in benchmarks?

Claude Opus 4.5 scores Tau2 Telecom: 98.2%, MMMLU: 90.8%, Tau2 Retail: 88.9%, GPQA: 87.0%, SWE-Bench Verified: 80.9%. Devstral Small 1.1 scores SWE-Bench Verified: 53.6%.

Is Claude Opus 4.5 cheaper than Devstral Small 1.1?

Devstral Small 1.1 is 50.0x cheaper for input tokens. Claude Opus 4.5 costs $5.00/M input and $25.00/M output via anthropic. Devstral Small 1.1 costs $0.10/M input and $0.30/M output via mistral.

What are the context window sizes for Claude Opus 4.5 and Devstral Small 1.1?

Claude Opus 4.5 supports 200K tokens and Devstral Small 1.1 supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Opus 4.5 and Devstral Small 1.1?

Key differences include context window (200K vs 128K), input pricing ($5.00 vs $0.10/M), multimodal support (yes vs no), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 4.5 and Devstral Small 1.1?

Claude Opus 4.5 is developed by Anthropic and Devstral Small 1.1 is developed by Mistral AI.

Related comparisons