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Mistral Medium 3.5 128B

MistralOpen weightsReasoningProvisionalReleased Apr 29, 2026
Compare with Mercury 2Source scores ↗
Overall score
33.6
Rank 168 of 222 · 19.3–48.0
Context window
256K
256,000 tokens
Price per 1M tokens
$1.50 in · $7.50 out
Source: BenchLM
Blended price
$3.00
3:1 input:output tokens
Output speed
—
Not measured yet

Category scores

Scores per capability area with the model's rank among ranked models in that category.

  1. 1Instruction following#5284.0
  2. 2Reasoning72.6
  3. 3Coding66.0
  4. 4Multimodal60.1
  5. 5Knowledge34.1
Higher is better. #N is the model's rank in that category, where it is eligible to be ranked.

Benchmark results (3)

As reported in system cards, papers and public evaluations. Position compares this model with every other model reporting the same benchmark.

Agentic & tool use

Gert Labs39.10#40 of 52
τ³-bench results91.4#2 of 23

Coding

SWE-bench Verified77.6#30 of 98

Pricing by source

USD per 1M tokens.

SourceInputOutputCached in
List price (BenchLM)$1.50$7.50—

Mistral's April 29, 2026 launch post lists Mistral Medium 3.5 API pricing at $1.50 input / $7.50 output per million tokens and describes the 128B dense model as open weights under a modified MIT license.

Open weights

From the Hugging Face repository.

Parameters
128B
Licence
other
Downloads (30 days)
75.1K

Speed

Measured by us through OpenRouter (median of trials).

Not available on OpenRouter, so we cannot measure it yet.

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