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Claude Opus 5.5 vs Ministral 8B Instruct

Claude Opus 5.5 leads the LLM Stats Score 59.7 to -4.7. Ministral 8B Instruct is 80.0x 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 -4.7, ranking #1 overall.

On price, Ministral 8B Instruct is roughly 80.0x 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 Ministral 8B Instruct

  • cost matters — it's about 80.0x 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
Ministral 8B Instruct
Mistral AI
Core performance indexes
LLM Stats Score
59.7
#1
-4.7
#358
Reasoning
57.8
#1
-4.8
#349
Coding
51.7
#1
-14.5
#273
Cost, coverage & limits
Benchmark wins
—
—
Input price
$4.00 / M
$0.10 / M
Output price
$20.00 / M
$0.10 / M
Context window
1,000,000
128,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Opus 5.5
Ministral 8B Instruct
Math
42.5#5
-4.1#317
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

31 reported for Claude Opus 5.5 · 11 for Ministral 8B Instruct

No common benchmarks found

Claude Opus 5.5 and Ministral 8B 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

Ministral 8B Instruct costs less

For input processing, Claude Opus 5.5 ($4.00/1M tokens) is 40.0x more expensive than Ministral 8B Instruct ($0.10/1M tokens).

For output processing, Claude Opus 5.5 ($20.00/1M tokens) is 200.0x more expensive than Ministral 8B Instruct ($0.10/1M tokens).

In conclusion, Claude Opus 5.5 is more expensive than Ministral 8B 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
Ministral 8B Instruct
Input tokens$0.10
Output tokens$0.10
Best providerMistral
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 Ministral 8B Instruct's 128,000 tokens. Both models can generate responses up to 128,000 tokens.

Anthropic
Claude Opus 5.5
Input1,000,000 tokens
Output128,000 tokens
Mistral AI
Ministral 8B Instruct
Input128,000 tokens
Output128,000 tokens
Wed Sep 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Opus 5.5 supports multimodal inputs, whereas Ministral 8B 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

Ministral 8B Instruct

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 5.5 is licensed under a proprietary license, while Ministral 8B Instruct uses Mistral Research License.

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

Claude Opus 5.5

Proprietary

Closed source

Ministral 8B Instruct

Mistral Research License

Open weights

Release Timeline

When each model was launched

Claude Opus 5.5 was released on 2026-09-22, while Ministral 8B Instruct was released on 2024-10-16.

Claude Opus 5.5 is 24 months newer than Ministral 8B Instruct.

Claude Opus 5.5

Sep 22, 2026

0 days ago

1.9yr newer
Ministral 8B Instruct

Oct 16, 2024

1.9 years ago

Knowledge Cutoff

When training data ends

Claude Opus 5.5 has a documented knowledge cutoff of 2026-06-01, while Ministral 8B Instruct'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 Ministral 8B Instruct's cutoff date.

Claude Opus 5.5

Jun 2026

Ministral 8B Instruct

—

Provider Availability

Claude Opus 5.5 is available from Anthropic. Ministral 8B Instruct is available from Mistral AI.

Claude Opus 5.5

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

Ministral 8B Instruct

mistral logo
Mistral
Input Price:Input: $0.10/1MOutput Price:Output: $0.10/1M
* 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 Ministral 8B Instruct side-by-side, then vote on the output you prefer.

Claude Opus 5.5
✓ Preferred
Ministral 8B Instruct
Open in Playground

FAQ

Common questions about Claude Opus 5.5 vs Ministral 8B Instruct.

Which is better, Claude Opus 5.5 or Ministral 8B Instruct?

Claude Opus 5.5 leads the LLM Stats Score 59.7 to -4.7. Claude Opus 5.5 is made by Anthropic and Ministral 8B 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 Ministral 8B 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%. Ministral 8B Instruct scores MT-Bench: 83.0%, Winogrande: 75.3%, ARC-C: 71.9%, Arena Hard: 70.9%, MBPP pass@1: 70.0%.

Is Claude Opus 5.5 cheaper than Ministral 8B Instruct?

Ministral 8B Instruct is 40.0x cheaper for input tokens. Claude Opus 5.5 costs $4.00/M input and $20.00/M output via anthropic. Ministral 8B Instruct costs $0.10/M input and $0.10/M output via mistral.

What are the context window sizes for Claude Opus 5.5 and Ministral 8B Instruct?

Claude Opus 5.5 supports 1.0M tokens and Ministral 8B Instruct 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 5.5 and Ministral 8B Instruct?

Key differences include LLM Stats Score (59.7 vs -4.7), context window (1.0M vs 128K), input pricing ($4.00 vs $0.10/M), multimodal support (yes vs no), licensing (Proprietary vs Mistral Research License). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5.5 and Ministral 8B Instruct?

Claude Opus 5.5 is developed by Anthropic and Ministral 8B Instruct is developed by Mistral AI.

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