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Claude Opus 5.5 vs Mistral Small 3 24B Instruct

Claude Opus 5.5 leads the LLM Stats Score 59.7 to 4.2. Mistral Small 3 24B Instruct is 139.1x 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 4.2, ranking #1 overall.

On price, Mistral Small 3 24B Instruct is roughly 139.1x 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 Mistral Small 3 24B Instruct

  • cost matters — it's about 139.1x cheaper per token
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Opus 5.5
Anthropic
Mistral Small 3 24B Instruct
Mistral AI
Core performance indexes
LLM Stats Score
59.7
#1
4.2
#309
Reasoning
57.8
#1
3.7
#304
Coding
51.7
#1
4.7
#211
Cost, coverage & limits
Benchmark wins
—
—
Input price
$4.00 / M
$0.05 / M
Output price
$20.00 / M
$0.08 / M
Context window
1,000,000
32,768

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Opus 5.5
Mistral Small 3 24B Instruct
Math
42.5#5
6.9#268
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

31 reported for Claude Opus 5.5 · 8 for Mistral Small 3 24B Instruct

No common benchmarks found

Claude Opus 5.5 and Mistral Small 3 24B Instructdon'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

Mistral Small 3 24B Instruct costs less

For input processing, Claude Opus 5.5 ($4.00/1M tokens) is 80.0x more expensive than Mistral Small 3 24B Instruct ($0.05/1M tokens).

For output processing, Claude Opus 5.5 ($20.00/1M tokens) is 250.0x more expensive than Mistral Small 3 24B Instruct ($0.08/1M tokens).

In conclusion, Claude Opus 5.5 is more expensive than Mistral Small 3 24B Instruct.*

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

Lowest available price from all providers
Wed Sep 23 2026 • llm-stats.com
Anthropic
Claude Opus 5.5
Input tokens$4.00
Output tokens$20.00
Best providerAnthropic
Mistral AI
Mistral Small 3 24B Instruct
Input tokens$0.05
Output tokens$0.08
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 5.5 accepts 1,000,000 input tokens compared to Mistral Small 3 24B Instruct's 32,768 tokens. Claude Opus 5.5 can generate longer responses up to 128,000 tokens, while Mistral Small 3 24B Instruct is limited to 32,768 tokens.

Anthropic
Claude Opus 5.5
Input1,000,000 tokens
Output128,000 tokens
Mistral AI
Mistral Small 3 24B Instruct
Input32,768 tokens
Output32,768 tokens
Wed Sep 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Opus 5.5 supports multimodal inputs, whereas Mistral Small 3 24B Instruct 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

Text
Images
Audio
Video

Mistral Small 3 24B Instruct

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 5.5 is licensed under a proprietary license, while Mistral Small 3 24B Instruct uses Apache 2.0.

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

Claude Opus 5.5

Proprietary

Closed source

Mistral Small 3 24B Instruct

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Opus 5.5 was released on 2026-09-22, while Mistral Small 3 24B Instruct was released on 2025-01-30.

Claude Opus 5.5 is 20 months newer than Mistral Small 3 24B Instruct.

Claude Opus 5.5

Sep 22, 2026

0 days ago

1.6yr newer
Mistral Small 3 24B Instruct

Jan 30, 2025

1.6 years ago

Knowledge Cutoff

When training data ends

Claude Opus 5.5 has a knowledge cutoff of 2026-06-01, while Mistral Small 3 24B Instruct has a cutoff of 2023-10-01.

Claude Opus 5.5 has more recent training data (up to 2026-06-01), making it potentially better informed about events through that date compared to Mistral Small 3 24B Instruct (2023-10-01).

Claude Opus 5.5

Jun 2026

2.7 yr newer
Mistral Small 3 24B Instruct

Oct 2023

Provider Availability

Claude Opus 5.5 is available from Anthropic. Mistral Small 3 24B Instruct is available from DeepInfra, Mistral AI.

Claude Opus 5.5

anthropic logo
Anthropic
Input Price:Input: $4.00/1MOutput Price:Output: $20.00/1M

Mistral Small 3 24B Instruct

deepinfra logo
Deepinfra
Input Price:Input: $0.05/1MOutput Price:Output: $0.08/1M
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→

Judge for yourself.

Run your own prompts against Claude Opus 5.5 and Mistral Small 3 24B Instruct side-by-side, then vote on the output you prefer.

Claude Opus 5.5
✓ Preferred
Mistral Small 3 24B Instruct
Open in Playground

FAQ

Common questions about Claude Opus 5.5 vs Mistral Small 3 24B Instruct.

Which is better, Claude Opus 5.5 or Mistral Small 3 24B Instruct?

Claude Opus 5.5 leads the LLM Stats Score 59.7 to 4.2. Claude Opus 5.5 is made by Anthropic and Mistral Small 3 24B Instruct is made by Mistral AI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Opus 5.5 compare to Mistral Small 3 24B Instruct in benchmarks?

Claude Opus 5.5 scores BenchCAD (with Python tool): 96.2%, Global-MMLU: 94.3%, SWE-bench Multilingual: 93.9%, MILU: 93.1%, ArXivMath: 91.2%. Mistral Small 3 24B Instruct scores Arena Hard: 87.6%, HumanEval: 84.8%, MT-Bench: 83.5%, IFEval: 82.9%, MATH: 70.6%.

Is Claude Opus 5.5 cheaper than Mistral Small 3 24B Instruct?

Mistral Small 3 24B Instruct is 80.0x cheaper for input tokens. Claude Opus 5.5 costs $4.00/M input and $20.00/M output via anthropic. Mistral Small 3 24B Instruct costs $0.05/M input and $0.08/M output via deepinfra.

What are the context window sizes for Claude Opus 5.5 and Mistral Small 3 24B Instruct?

Claude Opus 5.5 supports 1.0M tokens and Mistral Small 3 24B Instruct supports 33K 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 5.5 and Mistral Small 3 24B Instruct?

Key differences include LLM Stats Score (59.7 vs 4.2), context window (1.0M vs 33K), input pricing ($4.00 vs $0.05/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 5.5 and Mistral Small 3 24B Instruct?

Claude Opus 5.5 is developed by Anthropic and Mistral Small 3 24B Instruct is developed by Mistral AI.

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