o3 Mini
OpenAI • text+file->text
Context Window200K
Knowledge CutoffJan 31, 2025
o3 Mini vs DeepSeek V3 0324
DeepSeek V3 for general open-weight language tasks, o3-mini for structured reasoning under cost constraints.
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DeepSeek V3 0324
DeepSeek • text->text
Context Window164K
Knowledge CutoffMar 24, 2025
Editorial Verdict
o3-mini is OpenAI's reasoning specialist; DeepSeek V3 is the versatile open model.
o3-mini and DeepSeek V3 are both efficient for their capability level. o3-mini leads on hard reasoning tasks; DeepSeek V3 leads on coding and general versatility. For math and science reasoning, choose o3-mini. For coding and general-purpose tasks, DeepSeek V3 is compelling at a lower cost.
o3 Mini
- Superior performance on hard math and science reasoning benchmarks
- Configurable reasoning depth for task-appropriate inference
- OpenAI's ecosystem integration and mature API
Best for: Hard reasoning tasks integrated with OpenAI ecosystem
DeepSeek V3 0324
- Versatile general-purpose model with strong coding performance
- Open weights available for self-hosting
- Lower cost per token than o3-mini for general tasks
Best for: General-purpose coding and self-hosted deployments
Pricing sourced from OpenRouter — updates as their catalog changes.
Pricing Comparison
All values pull from OpenRouter and update as their catalog changes.
| Metric | o3 Mini | DeepSeek V3 0324 | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $1.10 | $0.29 | 🏆 DeepSeek V3 0324 |
| Output (per 1M tokens) | $4.40 | $1.14 | 🏆 DeepSeek V3 0324 |
| Request fee | N/A | N/A | N/A |
| Image fee | N/A | N/A | N/A |
Cost Estimator
Estimate monthly billing using real OpenRouter prices.
o3 Mini Total
$104.5DeepSeek V3 0324 Total
$27.25Estimated Monthly Savings: $77.25 with DeepSeek V3 0324
Capability Signals
Scores are directional estimates from model metadata — not official benchmark results.
o3 MiniMMLU Signal (Reasoning)DeepSeek V3 0324
87%
69%
o3 MiniHumanEval Signal (Coding)DeepSeek V3 0324
76%
76%
o3 MiniAgentic Tooling SignalDeepSeek V3 0324
84%
84%
o3 MiniMultimodal SignalDeepSeek V3 0324
69%
69%
Capabilities Matrix
Feature highlights for architecture and production fit.
o3 Mini Strengths
- Strong tool-calling and structured response support.
- Large context window for long documents and codebases.
- Strong reasoning profile for planning and analysis tasks.
DeepSeek V3 0324 Strengths
- Strong tool-calling and structured response support.
- Balanced general-purpose profile for chat, extraction, and automation tasks.
API Implementation
Quick start snippets for each provider style.
OpenAI (Python)
from openai import OpenAI
client = OpenAI()
response = client.chat.completions.create(
model="openai/o3-mini",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)DeepSeek (Python)
from openai import OpenAI
client = OpenAI()
response = client.chat.completions.create(
model="deepseek/deepseek-chat-v3-0324",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Choose o3 Mini when...
- You process large documents or code repositories in a single prompt.
- You rely on function calling, tool chaining, and structured output contracts.
- You want a balanced default for mixed chat and workflow automation workloads.
Choose DeepSeek V3 0324 when...
- You rely on function calling, tool chaining, and structured output contracts.
- You want a balanced default for mixed chat and workflow automation workloads.
- You can measure quality with your own benchmark and prompt set.
Frequently Asked Questions
Practical checks before selecting a production model.
Is o3-mini better than DeepSeek V3?
It depends on the workload. o3-mini and DeepSeek V3 differ in pricing, context window, and capability mix — see the side-by-side table above for the breakdown.
What's the price difference between o3-mini and DeepSeek V3?
o3-mini: $1.10 per 1M input tokens. DeepSeek V3: $0.29 per 1M input tokens. Output token pricing typically runs 2-5x higher.
Which model is better for coding?
Coding preference depends on your stack and tool-calling needs. Compare the coding signal row, test with your repository tasks, and validate latency in your target region.
Which model is cheaper at scale?
Input and output token pricing can diverge by workload profile. Use the estimator with your monthly request count and token mix to get a realistic cost difference.
Are these official benchmark numbers?
Pricing is live from OpenRouter. Benchmark rows are ModelsAtlas metadata-based signals and should be treated as directional guidance, not official leaderboard scores.
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