Claude 3.5 Sonnet vs o1
o1 shows notably better performance in the majority of benchmarks. Claude 3.5 Sonnet is 4.4x cheaper per token.
Anthropic · OpenAI · Updated for 2026
Which is better?
Claude 3.5 Sonnet outperforms in 2 benchmarks (HumanEval, MGSM), while o1 is better at 4 benchmarks (GPQA, GSM8k, MATH, MMLU). o1 shows notably better performance in the majority of benchmarks.
On price, Claude 3.5 Sonnet is roughly 4.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current benchmark, pricing, and model metadata for 2026.
Choose Claude 3.5 Sonnet
- cost matters — it's about 4.4x cheaper per token
Choose o1
- you want the strongest raw capability — it leads on 4 of 6 shared benchmarks
- you want the most recent training data — it shipped Dec 2024
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Claude 3.5 Sonnet outperforms in 2 benchmarks (HumanEval, MGSM), while o1 is better at 4 benchmarks (GPQA, GSM8k, MATH, MMLU).
o1 shows notably better performance in the majority of benchmarks.
Arena Performance
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude 3.5 Sonnet ($3.00/1M tokens) is 5.0x cheaper than o1 ($15.00/1M tokens).
For output processing, Claude 3.5 Sonnet ($15.00/1M tokens) is 4.0x cheaper than o1 ($60.00/1M tokens).
In conclusion, o1 is more expensive than Claude 3.5 Sonnet.*
* 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. Claude 3.5 Sonnet can generate longer responses up to 200,000 tokens, while o1 is limited to 100,000 tokens.
Input Capabilities
Supported data types and modalities
Claude 3.5 Sonnet supports multimodal inputs, whereas o1 does not.
Claude 3.5 Sonnet can handle both text and other forms of data like images, making it suitable for multimodal applications.
Claude 3.5 Sonnet
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 3.5 Sonnet was released on 2024-06-21, while o1 was released on 2024-12-17.
o1 is 6 months newer than Claude 3.5 Sonnet.
Jun 21, 2024
2.2 years ago
Dec 17, 2024
1.7 years ago
5mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Claude 3.5 Sonnet is available from Bedrock, Google. o1 is available from Azure, OpenAI.
Claude 3.5 Sonnet
o1
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude 3.5 Sonnet and o1 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude 3.5 Sonnet vs o1.