Model Comparison

Claude Opus 4.6 vs o3

Claude Opus 4.6 significantly outperforms across most benchmarks. o3 is 2.9x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

10 benchmarks

Claude Opus 4.6 outperforms in 9 benchmarks (AIME 2025, ARC-AGI v2, BrowseComp, GPQA, Humanity's Last Exam, MMMU-Pro, SWE-Bench Verified, Tau2 Retail, Tau2 Telecom), while o3 is better at 1 benchmark (CharXiv-R).

Claude Opus 4.6 significantly outperforms across most benchmarks.

Sun May 24 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

o3 costs less

For input processing, Claude Opus 4.6 ($5.00/1M tokens) is 2.5x more expensive than o3 ($2.00/1M tokens).

For output processing, Claude Opus 4.6 ($25.00/1M tokens) is 3.1x more expensive than o3 ($8.00/1M tokens).

In conclusion, Claude Opus 4.6 is more expensive than o3.*

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

Lowest available price from all providers
Sun May 24 2026 • llm-stats.com
Anthropic
Claude Opus 4.6
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
OpenAI
o3
Input tokens$2.00
Output tokens$8.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 4.6 accepts 1,000,000 input tokens compared to o3's 200,000 tokens. Claude Opus 4.6 can generate longer responses up to 128,000 tokens, while o3 is limited to 100,000 tokens.

Anthropic
Claude Opus 4.6
Input1,000,000 tokens
Output128,000 tokens
OpenAI
o3
Input200,000 tokens
Output100,000 tokens
Sun May 24 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 4.6 and o3 support multimodal inputs.

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

Claude Opus 4.6

Text
Images
Audio
Video

o3

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 4.6

Proprietary

Closed source

o3

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.6 was released on 2026-02-05, while o3 was released on 2025-04-16.

Claude Opus 4.6 is 10 months newer than o3.

Claude Opus 4.6

Feb 5, 2026

3 months ago

9mo newer
o3

Apr 16, 2025

1.1 years ago

Knowledge Cutoff

When training data ends

o3 has a documented knowledge cutoff of 2024-05-31, while Claude Opus 4.6's cutoff date is not specified.

We can confirm o3's training data extends to 2024-05-31, but cannot make a direct comparison without Claude Opus 4.6's cutoff date.

Claude Opus 4.6

—

o3

May 2024

Provider Availability

Claude Opus 4.6 is available from Anthropic. o3 is available from OpenAI.

Claude Opus 4.6

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M

o3

openai logo
OpenAI
Input Price:Input: $2.00/1MOutput Price:Output: $8.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Larger context window (1,000,000 tokens)
Higher AIME 2025 score (99.8% vs 86.4%)
Higher ARC-AGI v2 score (68.8% vs 6.5%)
Higher BrowseComp score (84.0% vs 49.7%)
Higher GPQA score (91.3% vs 83.3%)
Higher Humanity's Last Exam score (53.1% vs 14.7%)
Higher MMMU-Pro score (77.3% vs 76.4%)
Higher SWE-Bench Verified score (80.8% vs 69.1%)
Higher Tau2 Retail score (91.9% vs 80.2%)
Higher Tau2 Telecom score (99.3% vs 58.2%)
OpenAI
Less expensive input tokens
Less expensive output tokens
Higher CharXiv-R score (78.6% vs 77.4%)
AnthropicClaude Opus 4.6
OpenAIo3
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Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.6
OpenAI
o3

FAQ

Common questions about Claude Opus 4.6 vs o3.

Which is better, Claude Opus 4.6 or o3?

Claude Opus 4.6 significantly outperforms across most benchmarks. Claude Opus 4.6 is made by Anthropic and o3 is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Opus 4.6 compare to o3 in benchmarks?

Claude Opus 4.6 scores Vending-Bench 2: 100.0%, AIME 2025: 99.8%, Tau2 Telecom: 99.3%, Graphwalks parents >128k: 95.4%, MRCR v2 (8-needle): 93.0%. o3 scores COLLIE: 98.4%, AIME 2024: 91.6%, ARC-AGI: 88.0%, MathVista: 86.8%, AIME 2025: 86.4%.

Is Claude Opus 4.6 cheaper than o3?

o3 is 2.5x cheaper for input tokens. Claude Opus 4.6 costs $5.00/M input and $25.00/M output via anthropic. o3 costs $2.00/M input and $8.00/M output via openai.

What are the context window sizes for Claude Opus 4.6 and o3?

Claude Opus 4.6 supports 1.0M tokens and o3 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 Opus 4.6 and o3?

Key differences include context window (1.0M vs 200K), input pricing ($5.00 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 4.6 and o3?

Claude Opus 4.6 is developed by Anthropic and o3 is developed by OpenAI.