ZMIME
Comparison · 2 models · Updated Oct 4, 2026

Voxtral Small 24B 2507 vs Step 3.5 Flash

Step 3.5 Flash comes out ahead, 62 to 55 on our weighted score.

  1. Mistral AI

    Voxtral Small 24B 2507

    Released Jul 15, 2025

    55/100
    • ECI—
    • Price$0.10 / $0.30
    • Context33K
    Full specs Remove Voxtral Small 24B 2507
  2. Our pick

    StepFun

    Step 3.5 Flash

    Released Jan 29, 2026

    62/100
    • ECI—
    • Price$0.10 / $0.30
    • Context256K
    Full specs Remove Step 3.5 Flash

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Step 3.5 Flash is our pick

Step 3.5 Flash is the better all-round choice, scoring 62/100 against Voxtral Small 24B 2507 (55). It leads on context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.

  • CapabilityNot enough dataNo independent benchmark covers every model here yet
  • Lowest priceSame priceVoxtral Small 24B 2507 $0.15 · Step 3.5 Flash $0.15 per 1M tokens (3:1 blend)
  • Longest contextStep 3.5 FlashStep 3.5 Flash 256,000 · Voxtral Small 24B 2507 32,768 tokens
  • Widest inputsVoxtral Small 24B 2507Voxtral Small 24B 2507: Text, Audio · Step 3.5 Flash: Text
  • Self-hostingAll open weightsEvery model here can be downloaded and run on your own hardware
How the score is built
MeasureWeightVoxtral Small 24B 2507Step 3.5 Flash
Price50%8989
Inputs & features30%3535
Context window20%036
Overall100%55/10062/100

Left out because at least one model lacks the data: capability. The remaining weights were rescaled.

02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

Voxtral Small 24B 2507 vs Step 3.5 Flash specifications side by side
SpecificationVoxtral Small 24B 2507Mistral AIStep 3.5 FlashStepFun
Capability
Capabilities Index (ECI)——
ECI rank——
Price per million tokens
Input$0.10$0.10
Output$0.30$0.30
Cached input—$0.02
Blended (3:1)$0.15$0.15
Long-context rateSame rateSame rate
Price sourceOfficial Mistral APIOfficial StepFun (Global) API
Limits
Context window32,768 tokens256,000 tokens (best)
Max output32,768 tokens256,000 tokens (best)
Inputs and features
TextYesYes
ImagesNoNo
PDFsNoNo
AudioYesNo
VideoNoNo
ReasoningNoYeslow · high
Tool callingYesYes
Structured outputNoNo
Availability
WeightsOpenApache 2.0Open
API model IDvoxtral-small-lateststep-3.5-flash
API providers78 (best)
ReleasedJul 15, 2025Jan 29, 2026
Knowledge cutoff—Jan 2025
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • Voxtral Small 24B 2507$1.60
  • Step 3.5 Flash$1.60
04 — Questions

Which should you choose?

Which is better: Voxtral Small 24B 2507 or Step 3.5 Flash?

Step 3.5 Flash is the better all-round choice, scoring 62/100 against Voxtral Small 24B 2507 (55). It leads on context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.

Which is cheaper, Voxtral Small 24B 2507 or Step 3.5 Flash?

Voxtral Small 24B 2507 and Step 3.5 Flash cost the same: $0.10 input / $0.30 output per million tokens.

Which scores higher on benchmarks?

There is no independent benchmark that covers both models yet. Voxtral Small 24B 2507 has not been scored yet and Step 3.5 Flash has not been scored yet.

Which is better for coding?

There are no published SWE-bench Verified results for Voxtral Small 24B 2507 and Step 3.5 Flash yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.

Which has the bigger context window?

Step 3.5 Flash has the largest context window at 256,000 tokens, against 32,768 for Voxtral Small 24B 2507. Maximum output per response: Voxtral Small 24B 2507 up to 32,768, Step 3.5 Flash up to 256,000 tokens.

Which can read images, PDFs, audio or video?

Voxtral Small 24B 2507 accepts text and audio; Step 3.5 Flash accepts text. Voxtral Small 24B 2507 handles the widest range of inputs.

Are any of these open source?

Yes, both publish their weights (Apache 2.0), so you can self-host them.

Which is newer?

Step 3.5 Flash is the newest, released Jan 29, 2026. Voxtral Small 24B 2507 came out Jul 15, 2025. Knowledge cutoff: Step 3.5 Flash Jan 2025.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.

05 — Keep comparing

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