Claude Opus 4 vs o1
Claude Opus 4 leads the LLM Stats Score 27.8 to 21.1. o1 is 1.1x cheaper per token.
Anthropic · OpenAI · Updated for 2026
Which is better?
Claude Opus 4 leads the overall LLM Stats Score 27.8 to 21.1, ranking #130 overall.
In the 5 individual benchmarks reported for both models, Claude Opus 4 wins 5; this is a narrower head-to-head signal than the composite indexes.
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.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude Opus 4
- overall performance matters — it scores 27.8 and ranks #130 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 5 of 5 exact shared results
- you want the most recent training data — it shipped May 2025
Choose o1
- cost matters — it's about 1.1x cheaper per token
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
9 reported for Claude Opus 4 · 19 for o1
Claude Opus 4 outperforms in 5 benchmarks (GPQA, MMMLU, SWE-Bench Verified, TAU-bench Airline, TAU-bench Retail), while o1 is better at 0 benchmarks.
Claude Opus 4 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Opus 4 ($15.00/1M tokens) costs the same as o1 ($15.00/1M tokens).
For output processing, Claude Opus 4 ($75.00/1M tokens) is 1.3x more expensive than o1 ($60.00/1M tokens).
In conclusion, Claude Opus 4 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 is limited to 32,000 tokens.
Input capabilities
Documented input modalities across available providers
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.
Claude Opus 4
o1
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
Claude Opus 4 was released on 2025-05-22, while o1 was released on 2024-12-17.
Claude Opus 4 is 5 months newer than o1.
May 22, 2025
1.3 years ago
5mo newerDec 17, 2024
1.7 years ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Claude Opus 4 is available from Anthropic, Bedrock, Google. o1 is available from Azure, OpenAI.
Claude Opus 4
o1
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Opus 4 and o1 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Opus 4 vs o1.