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Codestral 2 vs Gemini 2.5 Flash

A complete head-to-head: pricing, context window, benchmarks, modality coverage, and openness, with a programmatic verdict synthesized from the underlying data.

Updated

Codestral 2 specs · Gemini 2.5 Flash specs
Verdict by category
  • PriceGemini 2.5 Flash

    Gemini 2.5 Flash is roughly 3.0× cheaper on output tokens ($0.30 vs $0.90 per 1M).

  • Context windowGemini 2.5 Flash

    Gemini 2.5 Flash accepts 1.0M tokens vs 256K, 4.1× the room for long documents and codebases.

  • BenchmarksTie

    No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores.

  • ModalitiesGemini 2.5 Flash

    Gemini 2.5 Flash supports 3 modalities (text, vision, audio) vs 1 for Codestral 2.

  • OpennessCodestral 2

    Codestral 2 ships open weights (Mistral Non-Production License); Gemini 2.5 Flash is API-only.

On balance Gemini 2.5 Flash edges ahead, winning 3 of 5 categories against Codestral 2's 1. Gemini 2.5 Flash is roughly 3.0× cheaper on output tokens ($0.30 vs $0.90 per 1M). Gemini 2.5 Flash accepts 1.0M tokens vs 256K, 4.1× the room for long documents and codebases.

No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores. They differ in modality coverage, Codestral 2 handles text while Gemini 2.5 Flash handles text, vision, audio, which can be the deciding factor before you even look at benchmarks. Codestral 2 ships open weights (Mistral Non-Production License); Gemini 2.5 Flash is API-only.

Gemini 2.5 Flash is the newer of the two, released 3 months after Codestral 2, which usually means a more recent knowledge cutoff and updated safety post-training. Codestral 2 is usually picked for code completion and coding llm workloads, while Gemini 2.5 Flash sees more deployments in rag and long context. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.

Side-by-side specs

SpecCodestral 2Gemini 2.5 Flash
ProviderMistralGoogle
ReleasedJan 2025Apr 2025
Modalitiestexttext, vision, audio
Context window256K tokens1.0M tokens
Max output,,
Input · 1M$0.30 / 1M tokens$0.075 / 1M tokens
Output · 1M$0.90 / 1M tokens$0.30 / 1M tokens
Knowledge cutoff,2025-01
Open weightsYes (Mistral Non-Production License)No
API availableYesYes

Pricing at scale

What you'd actually pay at typical workloads. Numbers come from each model's published per-million-token rates.

  • Light usage, 100k in / 50k out per day$2.25 vs $0.675
  • Heavy usage, 1M in / 500k out per day$22.50 vs $6.75
  • RAG workload, 5M in / 200k out per day$50.40 vs $13.05

Light usage, 100k in / 50k out per day: $2.25 vs $0.675 per month, model B comes out ahead. Heavy usage, 1M in / 500k out per day: $22.50 vs $6.75 per month, model B comes out ahead. RAG workload, 5M in / 200k out per day: $50.40 vs $13.05 per month, model B comes out ahead.

Price calculator

Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.

  • Codestral 2$0.075
  • Gemini 2.5 Flash$0.022

Benchmarks compared

Only sourced numbers. Where a benchmark is missing for one model we show the available value rather than fabricating the other.

Codestral 2Gemini 2.5 Flash
  • HumanEval92.0
Pick Codestral 2 if

Codestral 2 fits when…

  • Fast inline completion
  • FIM support
  • Self-hostable for IP-sensitive teams
  • Self-hosting and on-prem requirements, open weights (Mistral Non-Production License).
Pick Gemini 2.5 Flash if

Gemini 2.5 Flash fits when…

  • Cheap and fast
  • Long context
  • Solid vision
  • Cost-sensitive workloads, 3.0× cheaper than Codestral 2 on output tokens.
  • Long-context tasks, handles 1.0M tokens vs 256K for Codestral 2.
Don't want either?

Consider Mistral Large 2

Mistral's flagship API model, strong on code and reasoning, EU-friendly hosting.

See Mistral Large 2 specsCodestral 2 vs Mistral Large 2Gemini 2.5 Flash vs Mistral Large 2

Frequently asked

  • Is Codestral 2 or Gemini 2.5 Flash cheaper?
    Gemini 2.5 Flash is cheaper at $0.30 / 1M tokens per million output tokens, vs $0.90 / 1M tokens for Codestral 2.
  • Which has the larger context window?
    Gemini 2.5 Flash accepts 1.0M tokens vs 256K for Codestral 2.
  • Is Codestral 2 or Gemini 2.5 Flash better for coding?
    Both Codestral 2 and Gemini 2.5 Flash are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.
  • Are either of these models open source?
    Codestral 2 ships open weights (Mistral Non-Production License). Gemini 2.5 Flash is API-only.
  • When were Codestral 2 and Gemini 2.5 Flash released?
    Codestral 2 was released by Mistral on 2025-01-14. Gemini 2.5 Flash was released by Google on 2025-04-09.
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