Devstral Medium vs GPT-6 Astra
GPT-6 Astra leads the LLM Stats Score 59.6 to 13.6. Devstral Medium is 25.0x cheaper per token.
Mistral AI · OpenAI · Updated for 2026
Which is better?
GPT-6 Astra leads the overall LLM Stats Score 59.6 to 13.6, ranking #1 overall.
On price, Devstral Medium is roughly 25.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-6 Astra also accepts a larger context window (1,050,000 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 Devstral Medium
- cost matters — it's about 25.0x cheaper per token
Choose GPT-6 Astra
- overall performance matters — it scores 59.6 and ranks #1 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you process long inputs — it offers a 1,050,000 token context window
- you want the most recent training data — it shipped Sep 2026
At a glance
The differences that matter most.
Individual benchmarks
1 reported for Devstral Medium · 22 for GPT-6 Astra
Devstral Medium and GPT-6 Astradon'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
For input processing, Devstral Medium ($0.40/1M tokens) is 25.0x cheaper than GPT-6 Astra ($10.00/1M tokens).
For output processing, Devstral Medium ($2.00/1M tokens) is 25.0x cheaper than GPT-6 Astra ($50.00/1M tokens).
In conclusion, GPT-6 Astra is more expensive than Devstral Medium.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-6 Astra accepts 1,050,000 input tokens compared to Devstral Medium's 128,000 tokens. Both models can generate responses up to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
GPT-6 Astra supports multimodal inputs, whereas Devstral Medium does not.
GPT-6 Astra can handle both text and other forms of data like images, making it suitable for multimodal applications.
Devstral Medium
GPT-6 Astra
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Devstral Medium was released on 2025-07-10, while GPT-6 Astra was released on 2026-09-04.
GPT-6 Astra is 14 months newer than Devstral Medium.
Jul 10, 2025
1.2 years ago
Sep 4, 2026
2 weeks ago
1.2yr newerKnowledge Cutoff
When training data ends
GPT-6 Astra has a documented knowledge cutoff of 2026-04-30, while Devstral Medium'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 Devstral Medium's cutoff date.
—
Apr 2026
Provider Availability
Devstral Medium is available from Mistral AI. GPT-6 Astra is available from OpenAI.
Devstral Medium
GPT-6 Astra
Outputs Comparison
Judge for yourself.
Run your own prompts against Devstral Medium and GPT-6 Astra side-by-side, then vote on the output you prefer.
FAQ
Common questions about Devstral Medium vs GPT-6 Astra.