Gemma 3 12B vs Mistral Medium 3 Instruct
Gemma 3 12B (2026) and Mistral Medium 3 Instruct (2025) are compact production models from Google DeepMind and MistralAI. Gemma 3 12B ships a 33k-token context window, while Mistral Medium 3 Instruct ships a 128k-token context window. On pricing, Gemma 3 12B costs $0.04/1M 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 is ~900% cheaper at $0.04/1M; pay for Mistral Medium 3 Instruct only for long-context analysis.
Decision scorecard
Local evidence first| Signal | Gemma 3 12B | Mistral Medium 3 Instruct |
|---|---|---|
| Best for | provider-routed production | multimodal apps and provider-routed production |
| Decision fit | Classification and JSON / Tool use | Long context and Vision |
| Context window | 33k | 128k |
| Cheapest output | $0.13/1M tokens | $2/1M tokens |
| Provider routes | 5 tracked | 2 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Gemma 3 12B has the lower cheapest tracked output price at $0.13/1M tokens.
- Gemma 3 12B has broader tracked provider coverage for fallback and procurement flexibility.
- Gemma 3 12B uniquely exposes Structured outputs in local model data.
- Local decision data tags Gemma 3 12B for Classification and JSON / Tool use.
- Mistral Medium 3 Instruct has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Mistral Medium 3 Instruct uniquely exposes Vision and Multimodal in local model data.
- Local decision data tags Mistral Medium 3 Instruct for Long context and Vision.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Gemma 3 12B
$64.50
Cheapest tracked route/tier: OpenRouter
Mistral Medium 3 Instruct
$820
Cheapest tracked route/tier: Mistral AI Studio
Estimated monthly gap: $756. 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 and Mistral Medium 3 Instruct; plan for SDK, billing, or endpoint changes.
- Mistral Medium 3 Instruct is $1.87/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Structured outputs before moving production traffic.
- Mistral Medium 3 Instruct adds Vision and Multimodal in local capability data.
- No overlapping tracked provider route is sourced for Mistral Medium 3 Instruct and Gemma 3 12B; plan for SDK, billing, or endpoint changes.
- Gemma 3 12B is $1.87/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision and Multimodal before moving production traffic.
- Gemma 3 12B adds Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-01-01 | 2025-10-01 |
| Context window | 33k | 128k |
| Parameters | 12B | — |
| Architecture | decoder only | decoder only |
| License | Gemma | Proprietary |
| Openness | Open weights | Proprietary |
| Commercial use | Commercial use with conditions | Commercial use with conditions |
| Knowledge cutoff | 2024-08 | 2025-03 |
Pricing and availability
| Pricing attribute | Gemma 3 12B | Mistral Medium 3 Instruct |
|---|---|---|
| Input price | $0.04/1M tokens | $0.40/1M tokens |
| Output price | $0.13/1M tokens | $2/1M tokens |
| Providers |
Capabilities
| Capability | Gemma 3 12B | Mistral Medium 3 Instruct |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | No | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | Yes | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Mistral Medium 3 Instruct, multimodal input: Mistral Medium 3 Instruct, and structured outputs: Gemma 3 12B. 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 lists $0.04/1M input and $0.13/1M output tokens on the cheapest tracked provider, while Mistral Medium 3 Instruct 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 lower by about $0.81 per million blended tokens. Availability is 5 providers versus 2, so concentration risk also matters.
Choose Gemma 3 12B when provider fit, lower input-token cost, and broader provider choice are central to the workload. Choose Mistral Medium 3 Instruct when long-context analysis and larger context windows 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.
FAQ
Which has a larger context window, Gemma 3 12B or Mistral Medium 3 Instruct?
Mistral Medium 3 Instruct supports 128k tokens, while Gemma 3 12B supports 33k 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 or Mistral Medium 3 Instruct?
Gemma 3 12B is cheaper on tracked token pricing. Gemma 3 12B costs $0.04/1M input and $0.13/1M output tokens. Mistral Medium 3 Instruct 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 or Mistral Medium 3 Instruct open source?
Gemma 3 12B is listed under Gemma. Mistral Medium 3 Instruct 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 vision, Gemma 3 12B or Mistral Medium 3 Instruct?
Mistral Medium 3 Instruct has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for multimodal input, Gemma 3 12B or Mistral Medium 3 Instruct?
Mistral Medium 3 Instruct has the clearer documented multimodal input signal in this comparison. If multimodal input 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 and Mistral Medium 3 Instruct?
Gemma 3 12B is available on Cloudflare Workers AI, AWS Bedrock, OpenRouter, GCP Vertex AI, and Novita AI. Mistral Medium 3 Instruct is available on NVIDIA NIM and Mistral AI Studio. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-06-04. Data sourced from public model cards and provider documentation.