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Claude Opus 5.5 vs Mistral Large 4

Claude Opus 5.5 leads the LLM Stats Score 60.5 to 46.4. Mistral Large 4 is 7.7x cheaper per token.

Anthropic · Mistral AI · Updated for 2026

Which is better?

Claude Opus 5.5 leads the overall LLM Stats Score 60.5 to 46.4, ranking #1 overall.

In the 3 individual benchmarks reported for both models, Claude Opus 5.5 wins 2; this is a narrower head-to-head signal than the composite indexes.

On price, Mistral Large 4 is roughly 7.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Opus 5.5

  • overall performance matters — it scores 60.5 and ranks #1 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 2 of 3 exact shared results

Choose Mistral Large 4

  • cost matters — it's about 7.7x cheaper per token
  • you want the most recent training data — it shipped Oct 2026

At a glance

The differences that matter most.

Claude Opus 5.5
Anthropic
Mistral Large 4
Mistral AI
Core performance indexes
LLM Stats Score
60.5
#1
46.4
#33
Reasoning
59.1
#1
44.0
#42
Coding
51.3
#1
36.5
#24
Agents
45.5
#1
34.7
#25
Cost, coverage & limits
Benchmark wins
2 of 3
1 of 3
Input price
$4.00 / M
$0.68 / M
Output price
$20.00 / M
$2.09 / M
Context window
1,000,000
1,000,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Claude Opus 5.5
Mistral Large 4
Vision
41.2#1
1.1#185
Tool use
32.4#3
27.2#25
Multimodal
40.7#1
1.7#158
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

31 reported for Claude Opus 5.5 · 15 for Mistral Large 4

3 shared

Claude Opus 5.5 outperforms in 2 benchmarks (DeepSWE 1.1, Terminal-Bench 4.0), while Mistral Large 4 is better at 1 benchmark (AutomationBench).

Claude Opus 5.5 shows notably better performance in the majority of benchmarks.

Wed Oct 07 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Mistral Large 4 costs less

For input processing, Claude Opus 5.5 ($4.00/1M tokens) is 5.9x more expensive than Mistral Large 4 ($0.68/1M tokens).

For output processing, Claude Opus 5.5 ($20.00/1M tokens) is 9.6x more expensive than Mistral Large 4 ($2.09/1M tokens).

In conclusion, Claude Opus 5.5 is more expensive than Mistral Large 4.*

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

Lowest available price from all providers
Wed Oct 07 2026 • llm-stats.com
Anthropic
Claude Opus 5.5
Input tokens$4.00
Output tokens$20.00
Best providerAnthropic
Mistral AI
Mistral Large 4
Input tokens$0.68
Output tokens$2.09
Best providerMistral
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,000,000 tokens. Only Claude Opus 5.5 specifies output context (128,000 tokens).

Anthropic
Claude Opus 5.5
Input1,000,000 tokens
Output128,000 tokens
Mistral AI
Mistral Large 4
Input1,000,000 tokens
Output- tokens
Wed Oct 07 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Opus 5.5 and Mistral Large 4 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Opus 5.5

Text
Images
Audio
Video

Mistral Large 4

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Opus 5.5

Proprietary

Closed source

Mistral Large 4

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 5.5 was released on 2026-09-22, while Mistral Large 4 was released on 2026-10-06.

Mistral Large 4 is 0 month newer than Claude Opus 5.5.

Claude Opus 5.5

Sep 22, 2026

2 weeks ago

Mistral Large 4

Oct 6, 2026

1 days ago

2w newer

Knowledge Cutoff

When training data ends

Claude Opus 5.5 has a documented knowledge cutoff of 2026-06-01, while Mistral Large 4'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 Mistral Large 4's cutoff date.

Claude Opus 5.5

Jun 2026

Mistral Large 4

—

Provider Availability

Claude Opus 5.5 is available from Anthropic. Mistral Large 4 is available from Mistral AI.

Claude Opus 5.5

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

Mistral Large 4

mistral logo
Mistral
Input Price:Input: $0.68/1MOutput Price:Output: $2.09/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Opus 5.5 and Mistral Large 4 side-by-side, then vote on the output you prefer.

Claude Opus 5.5
✓ Preferred
Mistral Large 4
Open in Playground

FAQ

Common questions about Claude Opus 5.5 vs Mistral Large 4.

Which is better, Claude Opus 5.5 or Mistral Large 4?

Claude Opus 5.5 leads the LLM Stats Score 60.5 to 46.4. Claude Opus 5.5 is made by Anthropic and Mistral Large 4 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 Large 4 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 Large 4 scores CyBench: 93.0%, SciCode: 91.8%, CyberGym: 82.0%, Finch (FinWorkBench): 67.4%, ChartQAPro: 63.1%.

Is Claude Opus 5.5 cheaper than Mistral Large 4?

Mistral Large 4 is 5.9x cheaper for input tokens. Claude Opus 5.5 costs $4.00/M input and $20.00/M output via anthropic. Mistral Large 4 costs $0.68/M input and $2.09/M output via mistral.

What are the context window sizes for Claude Opus 5.5 and Mistral Large 4?

Claude Opus 5.5 supports 1.0M tokens and Mistral Large 4 supports 1.0M 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 Large 4?

Key differences include LLM Stats Score (60.5 vs 46.4), input pricing ($4.00 vs $0.68/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5.5 and Mistral Large 4?

Claude Opus 5.5 is developed by Anthropic and Mistral Large 4 is developed by Mistral AI.

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