o3 Mini
o3 Mini is a legacy integration reference; evaluate o3 before starting new work.
Use it for
- Teams maintaining an existing integration
- Workloads that can use a 200k context window
- Buyers comparing 4 tracked provider routes
Do not use it for
- New production launches
- Vision or document-understanding workloads
- Family
- o3
- Released
- 2025-01-31
- Context
- 200k
- Max output
- 100,000
- Architecture
- Decoder Only
- Knowledge cutoff
- 2025-04
- Specialization
- general
- Openness
- Proprietary
- License
- ProprietaryCommercial use: conditional
- Weights
- Not released
- Code
- Unknown
- Training
- Fine-tuned
Cheapest of 4 routes · OpenRouter
This model is deprecated. OpenAI recommends switching to o3.
About
OpenAI o3-mini - cost-optimized reasoning model. Compact variant of reasoning model family.
o3 Mini is a proprietary model in the o3 family. The structured metadata tracks a 200k-token context window, reasoning, function calling, tool use, structured outputs, and code execution. This page tracks provider routes through OpenRouter, Azure OpenAI, OpenAI API, and 1 more, with the cheapest tracked route listed at $1.1 input and $4.4 output per 1M tokens. Headline tracked benchmarks include Aider Polyglot 60.4, Chatbot Arena 1335.0, and Google-Proof Q&A 79.7.
Top use-case fit: coding, agents, and build tasks
Coding
2 relevant benchmarks in the decision map.
RAG
Included by capability and metadata signals in the decision map.
Agents
1 relevant benchmark in the decision map.
Provider price ladder
Compare all 4Compare API pricing across 4 providers for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Batch in / out | Cache | Route |
|---|---|---|---|---|---|
| OpenRouter | $1.10 | $4.40 | - | - | Serverless |
| Vercel AI Gateway | $1.10 | $4.40 | - | read $0.550 | Serverless |
| Azure OpenAI | - | - | $0.150 / $0.600 | - | ServerlessPartial |
| OpenAI API | - | - | $0.150 / $0.600 | - | ServerlessPartial |
Available via routers & gateways(16)
LiteLLM
GatewayOpen-source Python SDK and proxy server that unifies 100+ LLM APIs behind a single OpenAI-compatible interface, with load balancing, cost tracking, and configurable failover.
OpenRouter
HybridUnified hybrid gateway to 400+ models from 60+ providers via a single OpenAI-compatible API, with optional auto-routing that selects the best model per prompt.
Portkey
GatewayProduction AI gateway routing to 1,600+ LLMs with failover, load balancing, semantic caching, and guardrails; Apache 2.0 core is fully self-hostable with the complete feature set.
AIRouter
RouterCommercial LLM router that analyzes incoming requests and routes to the optimal model for cost/quality/latency via a drop-in OpenAI-compatible API, with a privacy-preserving embedding mode that avoids sending prompt content.
Azure AI Foundry Model Router
RouterMicrosoft Azure AI Foundry's native model router that uses a trained ML model to route each prompt in real time to the optimal Azure-hosted model, with Balanced/Cost/Quality mode selection and automatic failover.
Helicone
GatewayObservability-first AI gateway with routing, caching, rate limiting, and request tracing; Apache 2.0 open-source core with a managed hosted tier for logging and analytics.
Capabilities
Benchmark peer barsfor Coding
Benchmark scores(6)
| Benchmark | Score | Version | Evaluation | Source |
|---|---|---|---|---|
| Aider Polyglot | 60.4 | 2026-04 (high)Observed 2026-04-14 | — | Source |
| Chatbot Arena | 1335.0 | —Observed 2026-04-15 | — | Source |
| Google-Proof Q&A | 79.7 | —Observed 2025-01-31 | — | Source |
| MMLU PRO | 79.1 | —Observed 2026-04-14 | — | Source |
| AIME 2024 | 87.3 | —Observed 2025-01-31 | — | Source |
| SWE-bench Verified | 49.3 | —Observed 2025-01-31 | — | Source |
Migration checks
No linked migration route is available for this model yet.
Compare o3 Mini with other models
Comparison and alternatives
Browse all comparisons →Show all 36 popular comparisonssorted by 7-day search impressions
Frequently asked questions
What is the context window of o3 Mini?
o3 Mini has a context window of 200k tokens.
What is the max output of o3 Mini?
o3 Mini can generate up to 100,000 output tokens.
How much does o3 Mini cost?
o3 Mini is available at $1.1/1M input tokens through OpenRouter.
When was o3 Mini released?
o3 Mini was released on 2025-01-31.
Which providers offer o3 Mini?
o3 Mini is available from 4 providers: OpenRouter, Azure OpenAI, OpenAI API, Vercel AI Gateway.
What benchmarks has o3 Mini been tested on?
o3 Mini has been evaluated on 6 benchmarks, including Aider Polyglot, Chatbot Arena, Google-Proof Q&A, MMLU PRO, AIME 2024.
Cheapest of 4 routes · OpenRouter