Model Comparison

GPT-5.4 vs Devstral MediumWhich is better in 2026?

Comparing GPT-5.4 and Devstral Medium across benchmarks, pricing, and capabilities.

Verdict: GPT-5.4 vs Devstral Medium — which is better?

GPT-5.4 (by OpenAI) and Devstral Medium (by Mistral AI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

On price, Devstral Medium is roughly 7.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-5.4 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose GPT-5.4 if…

  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Mar 2026

Choose Devstral Medium if…

  • cost matters — it's about 7.0x cheaper per token
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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5.4 and Devstral Mediumdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Devstral Medium costs less

For input processing, GPT-5.4 ($2.50/1M tokens) is 6.3x more expensive than Devstral Medium ($0.40/1M tokens).

For output processing, GPT-5.4 ($15.00/1M tokens) is 7.5x more expensive than Devstral Medium ($2.00/1M tokens).

In conclusion, GPT-5.4 is more expensive than Devstral Medium.*

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

Lowest available price from all providers
Sat Jun 13 2026 • llm-stats.com
OpenAI
GPT-5.4
Input tokens$2.50
Output tokens$15.00
Best providerOpenAI
Mistral AI
Devstral Medium
Input tokens$0.40
Output tokens$2.00
Best providerMistral
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.4 accepts 1,000,000 input tokens compared to Devstral Medium's 128,000 tokens. Both models can generate responses up to 128,000 tokens.

OpenAI
GPT-5.4
Input1,000,000 tokens
Output128,000 tokens
Mistral AI
Devstral Medium
Input128,000 tokens
Output128,000 tokens
Sat Jun 13 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5.4 supports multimodal inputs, whereas Devstral Medium does not.

GPT-5.4 can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-5.4

Text
Images
Audio
Video

Devstral Medium

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.

GPT-5.4

Proprietary

Closed source

Devstral Medium

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while Devstral Medium was released on 2025-07-10.

GPT-5.4 is 8 months newer than Devstral Medium.

GPT-5.4

Mar 5, 2026

3 months ago

7mo newer
Devstral Medium

Jul 10, 2025

11 months ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

GPT-5.4 is available from OpenAI. Devstral Medium is available from Mistral AI.

GPT-5.4

openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $15.00/1M

Devstral Medium

mistral logo
Mistral
Input Price:Input: $0.40/1MOutput Price:Output: $2.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (1,000,000 tokens)
Supports multimodal inputs
Mistral AI
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.4
Mistral AI
Devstral Medium

FAQ

Common questions about GPT-5.4 vs Devstral Medium.

Which is better, GPT-5.4 or Devstral Medium?

GPT-5.4 (OpenAI) and Devstral Medium (Mistral AI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GPT-5.4 compare to Devstral Medium in benchmarks?

GPT-5.4 scores Tau2 Telecom: 98.9%, ARC-AGI: 93.7%, Graphwalks BFS <128k: 93.0%, GPQA: 92.8%, Graphwalks parents <128k: 89.8%. Devstral Medium scores SWE-Bench Verified: 61.6%.

Is GPT-5.4 cheaper than Devstral Medium?

Devstral Medium is 6.3x cheaper for input tokens. GPT-5.4 costs $2.50/M input and $15.00/M output via openai. Devstral Medium costs $0.40/M input and $2.00/M output via mistral.

What are the context window sizes for GPT-5.4 and Devstral Medium?

GPT-5.4 supports 1.0M tokens and Devstral Medium 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 GPT-5.4 and Devstral Medium?

Key differences include context window (1.0M vs 128K), input pricing ($2.50 vs $0.40/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.4 and Devstral Medium?

GPT-5.4 is developed by OpenAI and Devstral Medium is developed by Mistral AI.

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