Mistral Large 2 vs o3-pro
Mistral Large 2 (2025) and o3-pro (2025) are frontier reasoning models from MistralAI and OpenAI. Mistral Large 2 ships a 128k-token context window, while o3-pro ships a 200k-token context window. On pricing, Mistral Large 2 costs $0.48/1M input tokens versus $20/1M 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.
Mistral Large 2 is ~4067% cheaper at $0.48/1M; pay for o3-pro only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Mistral Large 2 | o3-pro |
|---|---|---|
| Best for | multimodal apps, tool-calling agents, and provider-routed production | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 128k | 200k |
| Cheapest output | $2.40/1M tokens | $80/1M tokens |
| Provider routes | 3 tracked | 3 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Mistral Large 2 has the lower cheapest tracked output price at $2.40/1M tokens.
- Local decision data tags Mistral Large 2 for Coding, RAG, and Agents.
- o3-pro has the larger context window for long prompts, retrieval packs, or transcript analysis.
- o3-pro uniquely exposes Reasoning and Code execution in local model data.
- Local decision data tags o3-pro for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Mistral Large 2
$984
Cheapest tracked route/tier: AWS Bedrock
o3-pro
$36,000
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $35,016. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Mistral Large 2 and o3-pro; plan for SDK, billing, or endpoint changes.
- o3-pro is $77.60/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- o3-pro adds Reasoning and Code execution in local capability data.
- No overlapping tracked provider route is sourced for o3-pro and Mistral Large 2; plan for SDK, billing, or endpoint changes.
- Mistral Large 2 is $77.60/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Reasoning and Code execution before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-11-25 | 2025-06-10 |
| Context window | 128k | 200k |
| Parameters | 123B | — |
| Architecture | Decoder Only | Decoder Only |
| License | Mistral License | Proprietary |
| Openness | Open weights | Proprietary |
| Commercial use | Commercial use: non-commercial | Commercial use: conditional |
| Knowledge cutoff | 2025-07 | 2025-08 |
Pricing and availability
| Pricing attribute | Mistral Large 2 | o3-pro |
|---|---|---|
| Input price | $0.48/1M tokens | $20/1M tokens |
| Output price | $2.40/1M tokens | $80/1M tokens |
| Providers |
Capabilities
| Capability | Mistral Large 2 | o3-pro |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | No | Yes |
| Function calling | Yes | Yes |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | No | Yes |
| 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 reasoning mode: o3-pro and code execution: o3-pro. Both models share vision, multimodal input, function calling, and tool use, 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, Mistral Large 2 lists $0.48/1M input and $2.40/1M output tokens on the cheapest tracked provider, while o3-pro lists $20/1M input and $80/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Mistral Large 2 lower by about $36.94 per million blended tokens. Availability is 3 providers versus 3, so concentration risk also matters.
Choose Mistral Large 2 when vision-heavy evaluation and lower input-token cost are central to the workload. Choose o3-pro when coding workflow support 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. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which has a larger context window, Mistral Large 2 or o3-pro?
o3-pro supports 200k tokens, while Mistral Large 2 supports 128k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Mistral Large 2 or o3-pro?
Mistral Large 2 is cheaper on tracked token pricing. Mistral Large 2 costs $0.48/1M input and $2.40/1M output tokens. o3-pro costs $20/1M input and $80/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Mistral Large 2 or o3-pro open source?
Mistral Large 2 is listed under Mistral License. o3-pro 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, Mistral Large 2 or o3-pro?
Both Mistral Large 2 and o3-pro expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, Mistral Large 2 or o3-pro?
Both Mistral Large 2 and o3-pro expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Where can I run Mistral Large 2 and o3-pro?
Mistral Large 2 is available on IBM watsonx, AWS Bedrock, and Mistral AI Studio. o3-pro is available on OpenRouter, OpenAI API, and Vercel AI Gateway. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-06-16. Data sourced from public model cards and provider documentation.