Model Comparison

Claude 3 Opus vs o4-mini

o4-mini significantly outperforms across most benchmarks. o4-mini is 15.6x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude 3 Opus outperforms in 0 benchmarks, while o4-mini is better at 1 benchmark (GPQA).

o4-mini significantly outperforms across most benchmarks.

Sat May 16 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

o4-mini costs less

For input processing, Claude 3 Opus ($15.00/1M tokens) is 13.6x more expensive than o4-mini ($1.10/1M tokens).

For output processing, Claude 3 Opus ($75.00/1M tokens) is 17.0x more expensive than o4-mini ($4.40/1M tokens).

In conclusion, Claude 3 Opus is more expensive than o4-mini.*

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

Lowest available price from all providers
Sat May 16 2026 • llm-stats.com
Anthropic
Claude 3 Opus
Input tokens$15.00
Output tokens$75.00
Best providerAnthropic
OpenAI
o4-mini
Input tokens$1.10
Output tokens$4.40
Best providerOpenAI
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. Claude 3 Opus can generate longer responses up to 200,000 tokens, while o4-mini is limited to 100,000 tokens.

Anthropic
Claude 3 Opus
Input200,000 tokens
Output200,000 tokens
OpenAI
o4-mini
Input200,000 tokens
Output100,000 tokens
Sat May 16 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude 3 Opus and o4-mini support multimodal inputs.

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

Claude 3 Opus

Text
Images
Audio
Video

o4-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 3 Opus

Proprietary

Closed source

o4-mini

Proprietary

Closed source

Release Timeline

When each model was launched

Claude 3 Opus was released on 2024-02-29, while o4-mini was released on 2025-04-16.

o4-mini is 14 months newer than Claude 3 Opus.

Claude 3 Opus

Feb 29, 2024

2.2 years ago

o4-mini

Apr 16, 2025

1.1 years ago

1.1yr newer

Knowledge Cutoff

When training data ends

o4-mini has a documented knowledge cutoff of 2024-05-31, while Claude 3 Opus'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 3 Opus's cutoff date.

Claude 3 Opus

—

o4-mini

May 2024

Provider Availability

Claude 3 Opus is available from Anthropic, Bedrock, Google. o4-mini is available from OpenAI.

Claude 3 Opus

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

o4-mini

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

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic

No standout differentiators in the data we have for this pair.

OpenAI
Less expensive input tokens
Less expensive output tokens
Higher GPQA score (81.4% vs 50.4%)
AnthropicClaude 3 Opus
OpenAIo4-mini
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude 3 Opus
OpenAI
o4-mini

FAQ

Common questions about Claude 3 Opus vs o4-mini.

Which is better, Claude 3 Opus or o4-mini?

o4-mini significantly outperforms across most benchmarks. Claude 3 Opus is made by Anthropic and o4-mini is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude 3 Opus compare to o4-mini in benchmarks?

Claude 3 Opus scores ARC-C: 96.4%, HellaSwag: 95.4%, GSM8k: 95.0%, MGSM: 90.7%, BIG-Bench Hard: 86.8%. o4-mini scores AIME 2024: 93.4%, AIME 2025: 92.7%, MathVista: 84.3%, MMMU: 81.6%, GPQA: 81.4%.

Is Claude 3 Opus cheaper than o4-mini?

o4-mini is 13.6x cheaper for input tokens. Claude 3 Opus costs $15.00/M input and $75.00/M output via anthropic. o4-mini costs $1.10/M input and $4.40/M output via openai.

What are the context window sizes for Claude 3 Opus and o4-mini?

Claude 3 Opus supports 200K tokens and o4-mini 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 Claude 3 Opus and o4-mini?

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

Who makes Claude 3 Opus and o4-mini?

Claude 3 Opus is developed by Anthropic and o4-mini is developed by OpenAI.