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GPT-6 Astra vs Mistral Small 3.1 24B Instruct

GPT-6 Astra leads the LLM Stats Score 60.7 to 4.3.

OpenAI · Mistral AI · Updated for 2026

Which is better?

GPT-6 Astra leads the overall LLM Stats Score 60.7 to 4.3, ranking #1 overall.

In the 1 individual benchmarks reported for both models, GPT-6 Astra wins 1; this is a narrower head-to-head signal than the composite indexes.

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

Choose GPT-6 Astra

  • overall performance matters — it scores 60.7 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 1 of 1 exact shared results
  • you want the most recent training data — it shipped Sep 2026

Choose Mistral Small 3.1 24B Instruct

  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

GPT-6 Astra
OpenAI
Mistral Small 3.1 24B Instruct
Mistral AI
Core performance indexes
LLM Stats Score
60.7
#1
4.3
#291
Reasoning
58.7
#1
4.4
#284
Coding
49.0
#1
9.8
#163
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
$10.00 / M
— / M
Output price
$50.00 / M
— / M
Context window
1,050,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
GPT-6 Astra
Mistral Small 3.1 24B Instruct
Math
35.3#42
8.2#254
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

22 reported for GPT-6 Astra · 9 for Mistral Small 3.1 24B Instruct

1 shared

GPT-6 Astra outperforms in 1 benchmarks (GPQA), while Mistral Small 3.1 24B Instruct is better at 0 benchmarks.

GPT-6 Astra significantly outperforms across most benchmarks.

Fri Sep 04 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only GPT-6 Astra specifies input context (1,050,000 tokens). Only GPT-6 Astra specifies output context (128,000 tokens).

OpenAI
GPT-6 Astra
Input1,050,000 tokens
Output128,000 tokens
Mistral AI
Mistral Small 3.1 24B Instruct
Input- tokens
Output- tokens
Fri Sep 04 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both GPT-6 Astra and Mistral Small 3.1 24B Instruct support multimodal inputs.

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

GPT-6 Astra

Text
Images
Audio
Video

Mistral Small 3.1 24B Instruct

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-6 Astra is licensed under a proprietary license, while Mistral Small 3.1 24B Instruct uses Apache 2.0.

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

GPT-6 Astra

Proprietary

Closed source

Mistral Small 3.1 24B Instruct

Apache 2.0

Open weights

Release Timeline

When each model was launched

GPT-6 Astra was released on 2026-09-03, while Mistral Small 3.1 24B Instruct was released on 2025-03-17.

GPT-6 Astra is 18 months newer than Mistral Small 3.1 24B Instruct.

GPT-6 Astra

Sep 3, 2026

0 days ago

1.5yr newer
Mistral Small 3.1 24B Instruct

Mar 17, 2025

1.5 years ago

Knowledge Cutoff

When training data ends

GPT-6 Astra has a documented knowledge cutoff of 2026-04-30, while Mistral Small 3.1 24B Instruct's cutoff date is not specified.

We can confirm GPT-6 Astra's training data extends to 2026-04-30, but cannot make a direct comparison without Mistral Small 3.1 24B Instruct's cutoff date.

GPT-6 Astra

Apr 2026

Mistral Small 3.1 24B Instruct

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against GPT-6 Astra and Mistral Small 3.1 24B Instruct side-by-side, then vote on the output you prefer.

GPT-6 Astra
✓ Preferred
Mistral Small 3.1 24B Instruct
Open in Playground

FAQ

Common questions about GPT-6 Astra vs Mistral Small 3.1 24B Instruct.

Which is better, GPT-6 Astra or Mistral Small 3.1 24B Instruct?

GPT-6 Astra leads the LLM Stats Score 60.7 to 4.3. GPT-6 Astra is made by OpenAI and Mistral Small 3.1 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 GPT-6 Astra compare to Mistral Small 3.1 24B Instruct in benchmarks?

GPT-6 Astra scores ExploitBench: 100.0%, ARC-AGI-3: 99.9%, ARC-AGI: 98.5%, FrontierMath Tier 4 (v2): 97.6%, GPQA: 96.0%. Mistral Small 3.1 24B Instruct scores HumanEval: 88.4%, MMLU: 80.6%, TriviaQA: 80.5%, MBPP: 74.7%, MATH: 69.3%.

What are the context window sizes for GPT-6 Astra and Mistral Small 3.1 24B Instruct?

GPT-6 Astra supports 1.1M tokens and Mistral Small 3.1 24B Instruct supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-6 Astra and Mistral Small 3.1 24B Instruct?

Key differences include LLM Stats Score (60.7 vs 4.3), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-6 Astra and Mistral Small 3.1 24B Instruct?

GPT-6 Astra is developed by OpenAI and Mistral Small 3.1 24B Instruct is developed by Mistral AI.

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