Model Comparison
GPT-5.4 vs Claude 3 SonnetWhich is better in 2026?
GPT-5.4 significantly outperforms across most benchmarks. GPT-5.4 is 1.1x cheaper per token.
Verdict: GPT-5.4 vs Claude 3 Sonnet — which is better?
GPT-5.4 (by OpenAI) and Claude 3 Sonnet (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.
GPT-5.4 outperforms in 1 benchmarks (GPQA), while Claude 3 Sonnet is better at 0 benchmarks. GPT-5.4 significantly outperforms across most benchmarks.
On price, GPT-5.4 is roughly 1.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.4 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Choose GPT-5.4 if…
- you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
- cost matters — it's about 1.1x cheaper per token
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped Mar 2026
Choose Claude 3 Sonnet if…
- you want predictable pricing at $3.00/M input and $15.00/M output
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.4 outperforms in 1 benchmarks (GPQA), while Claude 3 Sonnet is better at 0 benchmarks.
GPT-5.4 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.4 ($2.50/1M tokens) is 1.2x cheaper than Claude 3 Sonnet ($3.00/1M tokens).
For output processing, GPT-5.4 ($15.00/1M tokens) costs the same as Claude 3 Sonnet ($15.00/1M tokens).
In conclusion, Claude 3 Sonnet is more expensive than GPT-5.4.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.4 accepts 1,000,000 input tokens compared to Claude 3 Sonnet's 200,000 tokens. Claude 3 Sonnet can generate longer responses up to 200,000 tokens, while GPT-5.4 is limited to 128,000 tokens.
Input Capabilities
Supported data types and modalities
Both GPT-5.4 and Claude 3 Sonnet support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.4
Claude 3 Sonnet
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
GPT-5.4 was released on 2026-03-05, while Claude 3 Sonnet was released on 2024-02-29.
GPT-5.4 is 25 months newer than Claude 3 Sonnet.
Mar 5, 2026
3 months ago
2.0yr newerFeb 29, 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
GPT-5.4 is available from OpenAI. Claude 3 Sonnet is available from Anthropic, Bedrock, Google.
GPT-5.4
Claude 3 Sonnet
Outputs Comparison
Key Takeaways
GPT-5.4
View detailsOpenAI
Claude 3 Sonnet
View detailsAnthropic
No standout differentiators in the data we have for this pair.
Detailed Comparison
| Feature | | |
|---|
FAQ
Common questions about GPT-5.4 vs Claude 3 Sonnet.