Model Comparison

Devstral Medium vs Kimi K2 InstructWhich is better in 2026?

Comparing Devstral Medium and Kimi K2 Instruct across benchmarks, pricing, and capabilities.

Verdict: Devstral Medium vs Kimi K2 Instruct — which is better?

Devstral Medium (by Mistral AI) and Kimi K2 Instruct (by Moonshot 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, Kimi K2 Instruct is roughly 1.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Kimi K2 Instruct also accepts a larger context window (200,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Devstral Medium if…

  • you want predictable pricing at $0.40/M input and $2.00/M output

Choose Kimi K2 Instruct if…

  • cost matters — it's about 1.6x cheaper per token
  • you process long inputs — it offers a 200,000 token context window
  • you want the most recent training data — it shipped Jul 2025
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Devstral Medium and Kimi K2 Instructdon'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

Kimi K2 Instruct costs less

For input processing, Devstral Medium ($0.40/1M tokens) is 1.3x cheaper than Kimi K2 Instruct ($0.50/1M tokens).

For output processing, Devstral Medium ($2.00/1M tokens) is 4.0x more expensive than Kimi K2 Instruct ($0.50/1M tokens).

In conclusion, Devstral Medium is more expensive than Kimi K2 Instruct.*

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

Lowest available price from all providers
Sun Jul 26 2026 • llm-stats.com
Mistral AI
Devstral Medium
Input tokens$0.40
Output tokens$2.00
Best providerMistral
Moonshot AI
Kimi K2 Instruct
Input tokens$0.50
Output tokens$0.50
Best providerFireworks
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Kimi K2 Instruct accepts 200,000 input tokens compared to Devstral Medium's 128,000 tokens. Kimi K2 Instruct can generate longer responses up to 200,000 tokens, while Devstral Medium is limited to 128,000 tokens.

Mistral AI
Devstral Medium
Input128,000 tokens
Output128,000 tokens
Moonshot AI
Kimi K2 Instruct
Input200,000 tokens
Output200,000 tokens
Sun Jul 26 2026 • llm-stats.com

License

Usage and distribution terms

Devstral Medium is licensed under a proprietary license, while Kimi K2 Instruct uses MIT.

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

Devstral Medium

Proprietary

Closed source

Kimi K2 Instruct

MIT

Open weights

Release Timeline

When each model was launched

Devstral Medium was released on 2025-07-10, while Kimi K2 Instruct was released on 2025-07-11.

Kimi K2 Instruct is 0 month newer than Devstral Medium.

Devstral Medium

Jul 10, 2025

1.0 years ago

Kimi K2 Instruct

Jul 11, 2025

1.0 years ago

1d newer

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

Devstral Medium is available from Mistral AI. Kimi K2 Instruct is available from Fireworks, Novita.

Devstral Medium

mistral logo
Mistral
Input Price:Input: $0.40/1MOutput Price:Output: $2.00/1M

Kimi K2 Instruct

fireworks logo
Fireworks
Input Price:Input: $0.50/1MOutput Price:Output: $0.50/1M
novita logo
Novita
Input Price:Input: $0.57/1MOutput Price:Output: $2.30/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Mistral AI
Less expensive input tokens
Moonshot AI
Larger context window (200,000 tokens)
Less expensive output tokens
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Devstral Medium and Kimi K2 Instruct side-by-side, then vote on the output you prefer.

Devstral Medium
✓ Preferred
Kimi K2 Instruct
Open in Playground
AI Model Comparison Table
Feature
Mistral AI
Devstral Medium
Moonshot AI
Kimi K2 Instruct

FAQ

Common questions about Devstral Medium vs Kimi K2 Instruct.

Which is better, Devstral Medium or Kimi K2 Instruct?

Devstral Medium (Mistral AI) and Kimi K2 Instruct (Moonshot 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 Devstral Medium compare to Kimi K2 Instruct in benchmarks?

Devstral Medium scores SWE-Bench Verified: 61.6%. Kimi K2 Instruct scores MATH-500: 97.4%, GSM8k: 97.3%, CBNSL: 95.6%, HumanEval: 93.3%, MMLU-Redux: 92.7%.

Is Devstral Medium cheaper than Kimi K2 Instruct?

Devstral Medium is 1.3x cheaper for input tokens. Devstral Medium costs $0.40/M input and $2.00/M output via mistral. Kimi K2 Instruct costs $0.50/M input and $0.50/M output via fireworks.

What are the context window sizes for Devstral Medium and Kimi K2 Instruct?

Devstral Medium supports 128K tokens and Kimi K2 Instruct supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Devstral Medium and Kimi K2 Instruct?

Key differences include context window (128K vs 200K), input pricing ($0.40 vs $0.50/M), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Devstral Medium and Kimi K2 Instruct?

Devstral Medium is developed by Mistral AI and Kimi K2 Instruct is developed by Moonshot AI.

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