Model Comparison

o1 vs Claude Opus 4

Claude Opus 4 significantly outperforms across most benchmarks. o1 is 1.1x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

o1 outperforms in 0 benchmarks, while Claude Opus 4 is better at 5 benchmarks (GPQA, MMMLU, SWE-Bench Verified, TAU-bench Airline, TAU-bench Retail).

Claude Opus 4 significantly outperforms across most benchmarks.

Sat May 30 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

o1 costs less

For input processing, o1 ($15.00/1M tokens) costs the same as Claude Opus 4 ($15.00/1M tokens).

For output processing, o1 ($60.00/1M tokens) is 1.3x cheaper than Claude Opus 4 ($75.00/1M tokens).

In conclusion, Claude Opus 4 is more expensive than o1.*

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

Lowest available price from all providers
Sat May 30 2026 • llm-stats.com
OpenAI
o1
Input tokens$15.00
Output tokens$60.00
Best providerAzure
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. o1 can generate longer responses up to 100,000 tokens, while Claude Opus 4 is limited to 32,000 tokens.

OpenAI
o1
Input200,000 tokens
Output100,000 tokens
Anthropic
Claude Opus 4
Input200,000 tokens
Output32,000 tokens
Sat May 30 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Opus 4 supports multimodal inputs, whereas o1 does not.

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

o1

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.

o1

Proprietary

Closed source

Claude Opus 4

Proprietary

Closed source

Release Timeline

When each model was launched

o1 was released on 2024-12-17, while Claude Opus 4 was released on 2025-05-22.

Claude Opus 4 is 5 months newer than o1.

o1

Dec 17, 2024

1.4 years ago

Claude Opus 4

May 22, 2025

1.0 years ago

5mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

o1 is available from Azure, OpenAI. Claude Opus 4 is available from Anthropic, Bedrock, Google.

o1

azure logo
Azure
Input Price:Input: $15.00/1MOutput Price:Output: $60.00/1M
openai logo
OpenAI
Input Price:Input: $15.00/1MOutput Price:Output: $60.00/1M

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 output tokens
Anthropic
Supports multimodal inputs
Higher GPQA score (79.6% vs 78.0%)
Higher MMMLU score (88.8% vs 87.7%)
Higher SWE-Bench Verified score (72.5% vs 41.0%)
Higher TAU-bench Airline score (59.6% vs 50.0%)
Higher TAU-bench Retail score (81.4% vs 70.8%)
OpenAIo1
AnthropicClaude Opus 4
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Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
o1
Anthropic
Claude Opus 4

FAQ

Common questions about o1 vs Claude Opus 4.

Which is better, o1 or Claude Opus 4?

Claude Opus 4 significantly outperforms across most benchmarks. o1 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 o1 compare to Claude Opus 4 in benchmarks?

o1 scores GSM8k: 97.1%, MATH: 96.4%, GPQA Physics: 92.8%, MMLU: 91.8%, MGSM: 89.3%. Claude Opus 4 scores MMMLU: 88.8%, TAU-bench Retail: 81.4%, GPQA: 79.6%, MMMU (validation): 76.5%, AIME 2025: 75.5%.

Is o1 cheaper than Claude Opus 4?

Both models cost $15.00 per million input tokens.

What are the context window sizes for o1 and Claude Opus 4?

o1 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 o1 and Claude Opus 4?

Key differences include multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

Who makes o1 and Claude Opus 4?

o1 is developed by OpenAI and Claude Opus 4 is developed by Anthropic.