Model Comparison
GPT-5.4 vs o3-miniWhich is better in 2026?
GPT-5.4 significantly outperforms across most benchmarks. o3-mini is 2.9x cheaper per token.
Verdict: GPT-5.4 vs o3-mini — which is better?
GPT-5.4 (by OpenAI) and o3-mini (by OpenAI) 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 4 benchmarks (FrontierMath, GPQA, Graphwalks BFS <128k, Graphwalks parents <128k), while o3-mini is better at 0 benchmarks. GPT-5.4 significantly outperforms across most benchmarks.
On price, o3-mini is roughly 2.9x 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 4 of 4 shared benchmarks
- 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 o3-mini if…
- cost matters — it's about 2.9x cheaper per token
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.4 outperforms in 4 benchmarks (FrontierMath, GPQA, Graphwalks BFS <128k, Graphwalks parents <128k), while o3-mini 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 2.3x more expensive than o3-mini ($1.10/1M tokens).
For output processing, GPT-5.4 ($15.00/1M tokens) is 3.4x more expensive than o3-mini ($4.40/1M tokens).
In conclusion, GPT-5.4 is more expensive than o3-mini.*
* 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 o3-mini's 200,000 tokens. GPT-5.4 can generate longer responses up to 128,000 tokens, while o3-mini is limited to 100,000 tokens.
Input Capabilities
Supported data types and modalities
GPT-5.4 supports multimodal inputs, whereas o3-mini does not.
GPT-5.4 can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.4
o3-mini
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 o3-mini was released on 2025-01-30.
GPT-5.4 is 13 months newer than o3-mini.
Mar 5, 2026
3 months ago
1.1yr newerJan 30, 2025
1.3 years ago
Knowledge Cutoff
When training data ends
o3-mini has a documented knowledge cutoff of 2023-09-30, while GPT-5.4's cutoff date is not specified.
We can confirm o3-mini's training data extends to 2023-09-30, but cannot make a direct comparison without GPT-5.4's cutoff date.
—
Sep 2023
Provider Availability
GPT-5.4 is available from OpenAI. o3-mini is available from Azure, OpenAI.
GPT-5.4
o3-mini
Outputs Comparison
Key Takeaways
GPT-5.4
View detailsOpenAI
o3-mini
View detailsOpenAI
Detailed Comparison
FAQ
Common questions about GPT-5.4 vs o3-mini.