Gemma 3 12B Instruct vs Mistral Medium
Gemma 3 12B Instruct (2025) and Mistral Medium (2023) are compact production models from Google DeepMind and MistralAI. Gemma 3 12B Instruct ships a 128k-token context window, while Mistral Medium ships a 32k-token context window. On pricing, Gemma 3 12B Instruct costs $0.20/1M input tokens versus $0.40/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Gemma 3 12B Instruct is ~100% cheaper at $0.20/1M; pay for Mistral Medium only for provider fit.
Decision scorecard
Local evidence first| Signal | Gemma 3 12B Instruct | Mistral Medium |
|---|---|---|
| Best for | general production evaluation | provider-routed production |
| Decision fit | Long context | Coding, Classification, and JSON / Tool use |
| Context window | 128k | 32k |
| Cheapest output | $0.20/1M tokens | $2/1M tokens |
| Provider routes | 1 tracked | 2 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Gemma 3 12B Instruct has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemma 3 12B Instruct has the lower cheapest tracked output price at $0.20/1M tokens.
- Local decision data tags Gemma 3 12B Instruct for Long context.
- Mistral Medium has broader tracked provider coverage for fallback and procurement flexibility.
- Mistral Medium uniquely exposes Structured outputs in local model data.
- Local decision data tags Mistral Medium for Coding, Classification, and JSON / Tool use.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Gemma 3 12B Instruct
$210
Cheapest tracked route/tier: Fireworks AI
Mistral Medium
$820
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $610. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Gemma 3 12B Instruct and Mistral Medium; plan for SDK, billing, or endpoint changes.
- Mistral Medium is $1.80/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Mistral Medium adds Structured outputs in local capability data.
- No overlapping tracked provider route is sourced for Mistral Medium and Gemma 3 12B Instruct; plan for SDK, billing, or endpoint changes.
- Gemma 3 12B Instruct is $1.80/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Structured outputs before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-01-01 | 2023-12-11 |
| Context window | 128k | 32k |
| Parameters | 12B | — |
| Architecture | Decoder Only | Decoder Only |
| License | Gemma | Proprietary |
| Openness | Open weights | Proprietary |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | 2024-08 | - |
Pricing and availability
| Pricing attribute | Gemma 3 12B Instruct | Mistral Medium |
|---|---|---|
| Input price | $0.20/1M tokens | $0.40/1M tokens |
| Output price | $0.20/1M tokens | $2/1M tokens |
| Providers |
Capabilities
| Capability | Gemma 3 12B Instruct | Mistral Medium |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | No | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | No | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
Deep dive
The capability footprint differs most on structured outputs: Mistral Medium. Both models share the core language-model surface, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Gemma 3 12B Instruct lists $0.20/1M input and $0.20/1M output tokens on the cheapest tracked provider, while Mistral Medium lists $0.40/1M input and $2/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Gemma 3 12B Instruct lower by about $0.68 per million blended tokens. Availability is 1 providers versus 2, so concentration risk also matters.
Choose Gemma 3 12B Instruct when long-context analysis, larger context windows, and lower input-token cost are central to the workload. Choose Mistral Medium when provider fit and broader provider choice are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which has a larger context window, Gemma 3 12B Instruct or Mistral Medium?
Gemma 3 12B Instruct supports 128k tokens, while Mistral Medium supports 32k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Gemma 3 12B Instruct or Mistral Medium?
Gemma 3 12B Instruct is cheaper on tracked token pricing. Gemma 3 12B Instruct costs $0.20/1M input and $0.20/1M output tokens. Mistral Medium costs $0.40/1M input and $2/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Gemma 3 12B Instruct or Mistral Medium open source?
Gemma 3 12B Instruct is listed under Gemma. Mistral Medium is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for structured outputs, Gemma 3 12B Instruct or Mistral Medium?
Mistral Medium has the clearer documented structured outputs signal in this comparison. If structured outputs is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Gemma 3 12B Instruct and Mistral Medium?
Gemma 3 12B Instruct is available on Fireworks AI. Mistral Medium is available on Mistral AI Studio and OpenRouter. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
When should I pick Gemma 3 12B Instruct over Mistral Medium?
Gemma 3 12B Instruct is ~100% cheaper at $0.20/1M; pay for Mistral Medium only for provider fit. If your workload also depends on long-context analysis, start with Gemma 3 12B Instruct; if it depends on provider fit, run the same evaluation with Mistral Medium.
Continue comparing
Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.