Model Comparison

o1 vs Claude 3 OpusWhich is better in 2026?

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

Verdict: o1 vs Claude 3 Opus — which is better?

o1 (by OpenAI) and Claude 3 Opus (by Anthropic) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

o1 outperforms in 5 benchmarks (GPQA, GSM8k, HumanEval, MATH, MMLU), while Claude 3 Opus is better at 1 benchmark (MGSM). o1 significantly outperforms across most benchmarks.

On price, o1 is roughly 1.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose o1 if…

  • you want the strongest raw capability — it leads on 5 of 6 shared benchmarks
  • cost matters — it's about 1.1x cheaper per token
  • you want the most recent training data — it shipped Dec 2024

Choose Claude 3 Opus if…

  • you want predictable pricing at $15.00/M input and $75.00/M output
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Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

o1 outperforms in 5 benchmarks (GPQA, GSM8k, HumanEval, MATH, MMLU), while Claude 3 Opus is better at 1 benchmark (MGSM).

o1 significantly outperforms across most benchmarks.

Wed Jun 24 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 3 Opus ($15.00/1M tokens).

For output processing, o1 ($60.00/1M tokens) is 1.3x cheaper than Claude 3 Opus ($75.00/1M tokens).

In conclusion, Claude 3 Opus is more expensive than o1.*

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

Lowest available price from all providers
Wed Jun 24 2026 • llm-stats.com
OpenAI
o1
Input tokens$15.00
Output tokens$60.00
Best providerAzure
Anthropic
Claude 3 Opus
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. Claude 3 Opus can generate longer responses up to 200,000 tokens, while o1 is limited to 100,000 tokens.

OpenAI
o1
Input200,000 tokens
Output100,000 tokens
Anthropic
Claude 3 Opus
Input200,000 tokens
Output200,000 tokens
Wed Jun 24 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3 Opus supports multimodal inputs, whereas o1 does not.

Claude 3 Opus can handle both text and other forms of data like images, making it suitable for multimodal applications.

o1

Text
Images
Audio
Video

Claude 3 Opus

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 3 Opus

Proprietary

Closed source

Release Timeline

When each model was launched

o1 was released on 2024-12-17, while Claude 3 Opus was released on 2024-02-29.

o1 is 10 months newer than Claude 3 Opus.

o1

Dec 17, 2024

1.5 years ago

9mo newer
Claude 3 Opus

Feb 29, 2024

2.3 years ago

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 3 Opus 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 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
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Less expensive output tokens
Higher GPQA score (78.0% vs 50.4%)
Higher GSM8k score (97.1% vs 95.0%)
Higher HumanEval score (88.1% vs 84.9%)
Higher MATH score (96.4% vs 60.1%)
Higher MMLU score (91.8% vs 86.8%)
Anthropic
Supports multimodal inputs
Higher MGSM score (90.7% vs 89.3%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
o1
Anthropic
Claude 3 Opus

FAQ

Common questions about o1 vs Claude 3 Opus.

Which is better, o1 or Claude 3 Opus?

o1 significantly outperforms across most benchmarks. o1 is made by OpenAI and Claude 3 Opus 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 3 Opus in benchmarks?

o1 scores GSM8k: 97.1%, MATH: 96.4%, GPQA Physics: 92.8%, MMLU: 91.8%, MGSM: 89.3%. Claude 3 Opus scores ARC-C: 96.4%, HellaSwag: 95.4%, GSM8k: 95.0%, MGSM: 90.7%, BIG-Bench Hard: 86.8%.

Is o1 cheaper than Claude 3 Opus?

Both models cost $15.00 per million input tokens.

What are the context window sizes for o1 and Claude 3 Opus?

o1 supports 200K tokens and Claude 3 Opus 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 3 Opus?

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

Who makes o1 and Claude 3 Opus?

o1 is developed by OpenAI and Claude 3 Opus is developed by Anthropic.

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