Model Comparison

Devstral Small 1.1 vs o3-miniWhich is better in 2026?

Devstral Small 1.1 significantly outperforms across most benchmarks. Devstral Small 1.1 is 12.8x cheaper per token.

Verdict: Devstral Small 1.1 vs o3-mini — which is better?

Devstral Small 1.1 (by Mistral AI) and o3-mini (by OpenAI) 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.

Devstral Small 1.1 outperforms in 1 benchmarks (SWE-Bench Verified), while o3-mini is better at 0 benchmarks. Devstral Small 1.1 significantly outperforms across most benchmarks.

On price, Devstral Small 1.1 is roughly 12.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

o3-mini also accepts a larger context window (200,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Devstral Small 1.1 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • cost matters — it's about 12.8x cheaper per token
  • you want the most recent training data — it shipped Jul 2025
  • you need open weights you can self-host or fine-tune

Choose o3-mini if…

  • you process long inputs — it offers a 200,000 token context window

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Devstral Small 1.1 outperforms in 1 benchmarks (SWE-Bench Verified), while o3-mini is better at 0 benchmarks.

Devstral Small 1.1 significantly outperforms across most benchmarks.

Tue Jul 21 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, Devstral Small 1.1 ($0.10/1M tokens) is 11.0x cheaper than o3-mini ($1.10/1M tokens).

For output processing, Devstral Small 1.1 ($0.30/1M tokens) is 14.7x cheaper than o3-mini ($4.40/1M tokens).

In conclusion, o3-mini is more expensive than Devstral Small 1.1.*

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

Lowest available price from all providers
Tue Jul 21 2026 • llm-stats.com
Mistral AI
Devstral Small 1.1
Input tokens$0.10
Output tokens$0.30
Best providerMistral
OpenAI
o3-mini
Input tokens$1.10
Output tokens$4.40
Best providerAzure
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

o3-mini 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 o3-mini is limited to 100,000 tokens.

Mistral AI
Devstral Small 1.1
Input128,000 tokens
Output128,000 tokens
OpenAI
o3-mini
Input200,000 tokens
Output100,000 tokens
Tue Jul 21 2026 • llm-stats.com

License

Usage and distribution terms

Devstral Small 1.1 is licensed under Apache 2.0, while o3-mini uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

Devstral Small 1.1

Apache 2.0

Open weights

o3-mini

Proprietary

Closed source

Release Timeline

When each model was launched

Devstral Small 1.1 was released on 2025-07-11, while o3-mini was released on 2025-01-30.

Devstral Small 1.1 is 5 months newer than o3-mini.

Devstral Small 1.1

Jul 11, 2025

1.0 years ago

5mo newer
o3-mini

Jan 30, 2025

1.5 years ago

Knowledge Cutoff

When training data ends

o3-mini has a documented knowledge cutoff of 2023-09-30, while Devstral Small 1.1's cutoff date is not specified.

We can confirm o3-mini's training data extends to 2023-09-30, but cannot make a direct comparison without Devstral Small 1.1's cutoff date.

Devstral Small 1.1

—

o3-mini

Sep 2023

Provider Availability

Devstral Small 1.1 is available from Mistral AI. o3-mini is available from Azure, OpenAI.

Devstral Small 1.1

mistral logo
Mistral
Input Price:Input: $0.10/1MOutput Price:Output: $0.30/1M

o3-mini

azure logo
Azure
Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M
openai logo
OpenAI
Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Mistral AI
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher SWE-Bench Verified score (53.6% vs 49.3%)
OpenAI
Larger context window (200,000 tokens)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Devstral Small 1.1 and o3-mini side-by-side, then vote on the output you prefer.

Devstral Small 1.1
✓ Preferred
o3-mini
Open in Playground
AI Model Comparison Table
Feature
Mistral AI
Devstral Small 1.1
OpenAI
o3-mini

FAQ

Common questions about Devstral Small 1.1 vs o3-mini.

Which is better, Devstral Small 1.1 or o3-mini?

Devstral Small 1.1 significantly outperforms across most benchmarks. Devstral Small 1.1 is made by Mistral AI and o3-mini is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Devstral Small 1.1 compare to o3-mini in benchmarks?

Devstral Small 1.1 scores SWE-Bench Verified: 53.6%. o3-mini scores COLLIE: 98.7%, MATH: 97.9%, IFEval: 93.9%, MGSM: 92.0%, AIME 2024: 87.3%.

Is Devstral Small 1.1 cheaper than o3-mini?

Devstral Small 1.1 is 11.0x cheaper for input tokens. Devstral Small 1.1 costs $0.10/M input and $0.30/M output via mistral. o3-mini costs $1.10/M input and $4.40/M output via azure.

What are the context window sizes for Devstral Small 1.1 and o3-mini?

Devstral Small 1.1 supports 128K tokens and o3-mini supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Devstral Small 1.1 and o3-mini?

Key differences include context window (128K vs 200K), input pricing ($0.10 vs $1.10/M), licensing (Apache 2.0 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Devstral Small 1.1 and o3-mini?

Devstral Small 1.1 is developed by Mistral AI and o3-mini is developed by OpenAI.

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