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Codestral 2508 vs Qwen3 Coder Flash

Updated October 21, 2026. 0 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Codestral 2508 Replace Qwen3 Coder Flash
Codestral 2508Mistral AI
Coding
No data
Overall
No data
Output $/M
$0.90
Qwen3 Coder FlashQwen
Coding
No data
Overall
No data
Output $/M
$0.975
vs $0.90 vs $0.975 per 1M output tokens. Codestral 2508 is 1.1x cheaper.

Decision reading

Neither model has a coding score yet, so the two cannot be ranked on coding.

Codestral 2508 has the edge where output tokens cost 1.1x less.

Model ACodestral 2508Mistral AINot benchmarkedNo coding benchmarkNo cost per solved taskModel BQwen3 Coder FlashQwenNot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
0
Codestral 2508 only
7
Qwen3 Coder Flash only
0
Like-for-like categories
0 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
Codestral 2508 not benchmarked, Qwen3 Coder Flash not benchmarked.
Widest category
No category has a result for both models.
Widest single gap
No benchmark has a result for both models.
Output price
Codestral 2508 $0.90 against Qwen3 Coder Flash $0.975 per million output tokens, 1.1x apart.
Context window
Codestral 2508 takes 256K tokens, Qwen3 Coder Flash 1M.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

CodingDirectional onlySix of these boards feed the Vibe Coding Index1 board, none shared
Coding benchmarks for Codestral 2508 and Qwen3 Coder Flash
BenchmarkCodestral 2508Qwen3 Coder FlashLeader
ALE-Bench137.8Not measuredOnly Codestral 2508 measured
Neither model has a result on the other 37 boards here
IntelligenceNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Intelligence benchmarks for Codestral 2508 and Qwen3 Coder Flash
BenchmarkCodestral 2508Qwen3 Coder FlashLeader
Neither model has a result on 2 boards here
Agentic workNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Agentic work benchmarks for Codestral 2508 and Qwen3 Coder Flash
BenchmarkCodestral 2508Qwen3 Coder FlashLeader
Neither model has a result on 39 boards here
ReasoningNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Reasoning benchmarks for Codestral 2508 and Qwen3 Coder Flash
BenchmarkCodestral 2508Qwen3 Coder FlashLeader
Neither model has a result on 21 boards here
MathNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Math benchmarks for Codestral 2508 and Qwen3 Coder Flash
BenchmarkCodestral 2508Qwen3 Coder FlashLeader
Neither model has a result on 13 boards here
KnowledgeNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Knowledge benchmarks for Codestral 2508 and Qwen3 Coder Flash
BenchmarkCodestral 2508Qwen3 Coder FlashLeader
Neither model has a result on 17 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Web design benchmarks for Codestral 2508 and Qwen3 Coder Flash
BenchmarkCodestral 2508Qwen3 Coder FlashLeader
Design Arena: websites1013Not measuredOnly Codestral 2508 measured
Design Arena: UI components1017Not measuredOnly Codestral 2508 measured
Design Arena: game dev968Not measuredOnly Codestral 2508 measured
Design Arena: data viz1017Not measuredOnly Codestral 2508 measured
Design Arena: 3D1020Not measuredOnly Codestral 2508 measured
Design Arena: all code categories1007Not measuredOnly Codestral 2508 measured
Neither model has a result on the other 3 boards here
GeneralNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
General benchmarks for Codestral 2508 and Qwen3 Coder Flash
BenchmarkCodestral 2508Qwen3 Coder FlashLeader
Neither model has a result on 46 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Codestral 2508 and Qwen3 Coder Flash
BenchmarkCodestral 2508Qwen3 Coder FlashLeader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

Codestral 2508$0.0008Fits in one request
Qwen3 Coder Flash$0.0007Fits in one request

Qwen3 Coder Flash costs less

Repository review

50K input + 3K output tokens

Codestral 2508$0.018Fits in one request
Qwen3 Coder Flash$0.013Fits in one request

Qwen3 Coder Flash costs less

Agent loop

200K input + 10K output tokens

Codestral 2508$0.069Fits in one request
Qwen3 Coder Flash$0.049Fits in one request

Qwen3 Coder Flash costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of Codestral 2508 and Qwen3 Coder Flash
SpecificationMistral Codestral 2508Qwen3 Coder Flash
MakerMistral AIQwen
WeightsNo public weights listedNo public weights listed
ReleasedAugust 1, 2025September 17, 2025
Context window256K1M
Input $/Mtok$0.30$0.195
Output $/Mtok$0.90$0.975
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it00
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Codestral 2508 better than Qwen3 Coder Flash for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Codestral 2508 has the edge where output tokens cost 1.1x less.

Which is cheaper, Codestral 2508 or Qwen3 Coder Flash?

Codestral 2508 costs $0.30 per million input tokens and $0.90 per million output tokens; Qwen3 Coder Flash costs $0.195 and $0.975. Cost per solved task is known for neither of them.

Which has the bigger context window, Codestral 2508 or Qwen3 Coder Flash?

Qwen3 Coder Flash, with 1M tokens against 256K.

How many benchmarks is the Codestral 2508 vs Qwen3 Coder Flash comparison based on?

0 benchmarks have a result for both models as of October 21, 2026. Codestral 2508's coding index rests on 0 independent benchmarks and Qwen3 Coder Flash's on 0. Where only one model has a result, the page says so instead of naming a winner.

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