Model Comparison

Claude Opus 4 vs o3-mini

Claude Opus 4 significantly outperforms across most benchmarks. o3-mini is 15.6x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Claude Opus 4 outperforms in 4 benchmarks (GPQA, SWE-Bench Verified, TAU-bench Airline, TAU-bench Retail), while o3-mini is better at 0 benchmarks.

Claude Opus 4 significantly outperforms across most benchmarks.

Mon Apr 20 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

o3-mini costs less

For input processing, Claude Opus 4 ($15.00/1M tokens) is 13.6x more expensive than o3-mini ($1.10/1M tokens).

For output processing, Claude Opus 4 ($75.00/1M tokens) is 17.0x more expensive than o3-mini ($4.40/1M tokens).

In conclusion, Claude Opus 4 is more expensive than o3-mini.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Mon Apr 20 2026 • llm-stats.com
Anthropic
Claude Opus 4
Input tokens$15.00
Output tokens$75.00
Best providerAnthropic
OpenAI
o3-mini
Input tokens$1.10
Output tokens$4.40
Best providerAzure
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 200,000 tokens. o3-mini can generate longer responses up to 100,000 tokens, while Claude Opus 4 is limited to 32,000 tokens.

Anthropic
Claude Opus 4
Input200,000 tokens
Output32,000 tokens
OpenAI
o3-mini
Input200,000 tokens
Output100,000 tokens
Mon Apr 20 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Opus 4 supports multimodal inputs, whereas o3-mini does not.

Claude Opus 4 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Opus 4

Text
Images
Audio
Video

o3-mini

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Opus 4

Proprietary

Closed source

o3-mini

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4 was released on 2025-05-22, while o3-mini was released on 2025-01-30.

Claude Opus 4 is 4 months newer than o3-mini.

Claude Opus 4

May 22, 2025

11 months ago

3mo newer
o3-mini

Jan 30, 2025

1.2 years ago

Knowledge Cutoff

When training data ends

o3-mini has a documented knowledge cutoff of 2023-09-30, while Claude Opus 4's cutoff date is not specified.

We can confirm o3-mini's training data extends to 2023-09-30, but cannot make a direct comparison without Claude Opus 4's cutoff date.

Claude Opus 4

—

o3-mini

Sep 2023

Provider Availability

Claude Opus 4 is available from Anthropic, Bedrock, Google. o3-mini is available from Azure, OpenAI.

Claude Opus 4

anthropic logo
Anthropic
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
google logo
Google
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M

o3-mini

azure logo
Azure
Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M
openai logo
OpenAI
Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Supports multimodal inputs
Higher GPQA score (79.6% vs 77.2%)
Higher SWE-Bench Verified score (72.5% vs 49.3%)
Higher TAU-bench Airline score (59.6% vs 32.4%)
Higher TAU-bench Retail score (81.4% vs 57.6%)
OpenAI
Less expensive input tokens
Less expensive output tokens
AnthropicClaude Opus 4
OpenAIo3-mini
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Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Opus 4
OpenAI
o3-mini

FAQ

Common questions about Claude Opus 4 vs o3-mini

Claude Opus 4 significantly outperforms across most benchmarks. Claude Opus 4 is made by Anthropic and o3-mini is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Claude Opus 4 scores MMMLU: 88.8%, TAU-bench Retail: 81.4%, GPQA: 79.6%, MMMU (validation): 76.5%, AIME 2025: 75.5%. o3-mini scores COLLIE: 98.7%, MATH: 97.9%, IFEval: 93.9%, MGSM: 92.0%, AIME 2024: 87.3%.
o3-mini is 13.6x cheaper for input tokens. Claude Opus 4 costs $15.00/M input and $75.00/M output via anthropic. o3-mini costs $1.10/M input and $4.40/M output via azure.
Claude Opus 4 supports 200K tokens and o3-mini supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include input pricing ($15.00 vs $1.10/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.
Claude Opus 4 is developed by Anthropic and o3-mini is developed by OpenAI.