Claude 3.5 Sonnet vs GPT-4o
Claude 3.5 Sonnet and GPT-4o are closely matched at 15.9 and 11.5 on the LLM Stats Score. GPT-4o is 1.4x cheaper per token.
Anthropic · OpenAI · Updated for 2026
Which is better?
Claude 3.5 Sonnet and GPT-4o are closely matched on the overall LLM Stats Score at 15.9 and 11.5.
In the 7 individual benchmarks reported for both models, Claude 3.5 Sonnet wins 6; this is a narrower head-to-head signal than the composite indexes.
On price, GPT-4o is roughly 1.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Claude 3.5 Sonnet also accepts a larger context window (200,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude 3.5 Sonnet
- you value its reported benchmark strengths — it wins 6 of 7 exact shared results
- you process long inputs — it offers a 200,000 token context window
- you want the most recent training data — it shipped Jun 2024
Choose GPT-4o
- cost matters — it's about 1.4x 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 3.5 Sonnet · 8 for GPT-4o
Claude 3.5 Sonnet outperforms in 6 benchmarks (DROP, GPQA, HumanEval, MGSM, MMLU, MMLU-Pro), while GPT-4o is better at 1 benchmark (MATH).
Claude 3.5 Sonnet 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 3.5 Sonnet ($3.00/1M tokens) is 1.2x more expensive than GPT-4o ($2.50/1M tokens).
For output processing, Claude 3.5 Sonnet ($15.00/1M tokens) is 1.5x more expensive than GPT-4o ($10.00/1M tokens).
In conclusion, Claude 3.5 Sonnet is more expensive than GPT-4o.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Claude 3.5 Sonnet accepts 200,000 input tokens compared to GPT-4o's 128,000 tokens. Claude 3.5 Sonnet can generate longer responses up to 200,000 tokens, while GPT-4o is limited to 4,096 tokens.
Input capabilities
Documented input modalities across available providers
Both Claude 3.5 Sonnet and GPT-4o support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude 3.5 Sonnet
GPT-4o
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 GPT-4o was released on 2024-05-13.
Claude 3.5 Sonnet is 1 month newer than GPT-4o.
Jun 21, 2024
2.2 years ago
1mo newerMay 13, 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.
Provider Availability
Claude 3.5 Sonnet is available from Bedrock, Google. GPT-4o is available from Azure, OpenAI.
Claude 3.5 Sonnet
GPT-4o
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude 3.5 Sonnet and GPT-4o side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude 3.5 Sonnet vs GPT-4o.