Model Comparison
o1 vs Claude Opus 4.1Which is better in 2026?
Claude Opus 4.1 significantly outperforms across most benchmarks. o1 is 1.1x cheaper per token.
Verdict: o1 vs Claude Opus 4.1 — which is better?
o1 (by OpenAI) and Claude Opus 4.1 (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 0 benchmarks, while Claude Opus 4.1 is better at 5 benchmarks (GPQA, MMMLU, SWE-Bench Verified, TAU-bench Airline, TAU-bench Retail). Claude Opus 4.1 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…
- cost matters — it's about 1.1x cheaper per token
Choose Claude Opus 4.1 if…
- you want the strongest raw capability — it leads on 5 of 5 shared benchmarks
- you want the most recent training data — it shipped Aug 2025
Performance Benchmarks
Comparative analysis across standard metrics
o1 outperforms in 0 benchmarks, while Claude Opus 4.1 is better at 5 benchmarks (GPQA, MMMLU, SWE-Bench Verified, TAU-bench Airline, TAU-bench Retail).
Claude Opus 4.1 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, o1 ($15.00/1M tokens) costs the same as Claude Opus 4.1 ($15.00/1M tokens).
For output processing, o1 ($60.00/1M tokens) is 1.3x cheaper than Claude Opus 4.1 ($75.00/1M tokens).
In conclusion, Claude Opus 4.1 is more expensive than o1.*
* Using a 3:1 ratio of input to output tokens
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 4.1 is limited to 32,000 tokens.
Input Capabilities
Supported data types and modalities
Claude Opus 4.1 supports multimodal inputs, whereas o1 does not.
Claude Opus 4.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.
o1
Claude Opus 4.1
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
o1 was released on 2024-12-17, while Claude Opus 4.1 was released on 2025-08-05.
Claude Opus 4.1 is 8 months newer than o1.
Dec 17, 2024
1.5 years ago
Aug 5, 2025
10 months ago
7mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
o1 is available from Azure, OpenAI. Claude Opus 4.1 is available from Anthropic, Bedrock, Google.
o1
Claude Opus 4.1
Outputs Comparison
Key Takeaways
o1
View detailsOpenAI
Claude Opus 4.1
View detailsAnthropic
Detailed Comparison
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FAQ
Common questions about o1 vs Claude Opus 4.1.