Model Comparison

o4-mini vs Claude Opus 4

Claude Opus 4 has a slight edge in benchmark performance. o4-mini is 15.6x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

o4-mini outperforms in 2 benchmarks (AIME 2025, GPQA), while Claude Opus 4 is better at 3 benchmarks (SWE-Bench Verified, TAU-bench Airline, TAU-bench Retail).

Claude Opus 4 has a slight edge in benchmark performance.

Sun May 10 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

o4-mini costs less

For input processing, o4-mini ($1.10/1M tokens) is 13.6x cheaper than Claude Opus 4 ($15.00/1M tokens).

For output processing, o4-mini ($4.40/1M tokens) is 17.0x cheaper than Claude Opus 4 ($75.00/1M tokens).

In conclusion, Claude Opus 4 is more expensive than o4-mini.*

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

Lowest available price from all providers
Sun May 10 2026 • llm-stats.com
OpenAI
o4-mini
Input tokens$1.10
Output tokens$4.40
Best providerOpenAI
Anthropic
Claude Opus 4
Input tokens$15.00
Output tokens$75.00
Best providerAnthropic
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. o4-mini can generate longer responses up to 100,000 tokens, while Claude Opus 4 is limited to 32,000 tokens.

OpenAI
o4-mini
Input200,000 tokens
Output100,000 tokens
Anthropic
Claude Opus 4
Input200,000 tokens
Output32,000 tokens
Sun May 10 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both o4-mini and Claude Opus 4 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

o4-mini

Text
Images
Audio
Video

Claude Opus 4

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.

o4-mini

Proprietary

Closed source

Claude Opus 4

Proprietary

Closed source

Release Timeline

When each model was launched

o4-mini was released on 2025-04-16, while Claude Opus 4 was released on 2025-05-22.

Claude Opus 4 is 1 month newer than o4-mini.

o4-mini

Apr 16, 2025

1.1 years ago

Claude Opus 4

May 22, 2025

11 months ago

1mo newer

Knowledge Cutoff

When training data ends

o4-mini has a documented knowledge cutoff of 2024-05-31, while Claude Opus 4's cutoff date is not specified.

We can confirm o4-mini's training data extends to 2024-05-31, but cannot make a direct comparison without Claude Opus 4's cutoff date.

o4-mini

May 2024

Claude Opus 4

—

Provider Availability

o4-mini is available from OpenAI. Claude Opus 4 is available from Anthropic, Bedrock, Google.

o4-mini

openai logo
OpenAI
Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M

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
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Less expensive input tokens
Less expensive output tokens
Higher AIME 2025 score (92.7% vs 75.5%)
Higher GPQA score (81.4% vs 79.6%)
Anthropic
Higher SWE-Bench Verified score (72.5% vs 68.1%)
Higher TAU-bench Airline score (59.6% vs 49.2%)
Higher TAU-bench Retail score (81.4% vs 71.8%)
OpenAIo4-mini
AnthropicClaude Opus 4
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Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
o4-mini
Anthropic
Claude Opus 4

FAQ

Common questions about o4-mini vs Claude Opus 4.

Which is better, o4-mini or Claude Opus 4?

Claude Opus 4 has a slight edge in benchmark performance. o4-mini is made by OpenAI and Claude Opus 4 is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does o4-mini compare to Claude Opus 4 in benchmarks?

o4-mini scores AIME 2024: 93.4%, AIME 2025: 92.7%, MathVista: 84.3%, MMMU: 81.6%, GPQA: 81.4%. Claude Opus 4 scores MMMLU: 88.8%, TAU-bench Retail: 81.4%, GPQA: 79.6%, MMMU (validation): 76.5%, AIME 2025: 75.5%.

Is o4-mini cheaper than Claude Opus 4?

o4-mini is 13.6x cheaper for input tokens. o4-mini costs $1.10/M input and $4.40/M output via openai. Claude Opus 4 costs $15.00/M input and $75.00/M output via anthropic.

What are the context window sizes for o4-mini and Claude Opus 4?

o4-mini supports 200K tokens and Claude Opus 4 supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between o4-mini and Claude Opus 4?

Key differences include input pricing ($1.10 vs $15.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes o4-mini and Claude Opus 4?

o4-mini is developed by OpenAI and Claude Opus 4 is developed by Anthropic.