Model Comparison

GPT-5.4 vs o3-proWhich is better in 2026?

Comparing GPT-5.4 and o3-pro across benchmarks, pricing, and capabilities.

Verdict: GPT-5.4 vs o3-pro — which is better?

GPT-5.4 (by OpenAI) and o3-pro (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.

On price, GPT-5.4 is roughly 6.2x 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…

  • cost matters — it's about 6.2x 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 o3-pro if…

  • you want predictable pricing at $20.00/M input and $80.00/M output
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5.4 and o3-prodon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5.4 costs less

For input processing, GPT-5.4 ($2.50/1M tokens) is 8.0x cheaper than o3-pro ($20.00/1M tokens).

For output processing, GPT-5.4 ($15.00/1M tokens) is 5.3x cheaper than o3-pro ($80.00/1M tokens).

In conclusion, o3-pro is more expensive than GPT-5.4.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sat Jun 13 2026 • llm-stats.com
OpenAI
GPT-5.4
Input tokens$2.50
Output tokens$15.00
Best providerOpenAI
OpenAI
o3-pro
Input tokens$20.00
Output tokens$80.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.4 accepts 1,000,000 input tokens compared to o3-pro's 200,000 tokens. GPT-5.4 can generate longer responses up to 128,000 tokens, while o3-pro is limited to 100,000 tokens.

OpenAI
GPT-5.4
Input1,000,000 tokens
Output128,000 tokens
OpenAI
o3-pro
Input200,000 tokens
Output100,000 tokens
Sat Jun 13 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.4 and o3-pro support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

GPT-5.4

Text
Images
Audio
Video

o3-pro

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

GPT-5.4

Proprietary

Closed source

o3-pro

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while o3-pro was released on 2025-06-10.

GPT-5.4 is 9 months newer than o3-pro.

GPT-5.4

Mar 5, 2026

3 months ago

8mo newer
o3-pro

Jun 10, 2025

1.0 years ago

Knowledge Cutoff

When training data ends

o3-pro has a documented knowledge cutoff of 2024-05-31, while GPT-5.4's cutoff date is not specified.

We can confirm o3-pro's training data extends to 2024-05-31, but cannot make a direct comparison without GPT-5.4's cutoff date.

GPT-5.4

—

o3-pro

May 2024

Provider Availability

GPT-5.4 is available from OpenAI. o3-pro is available from OpenAI.

GPT-5.4

openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $15.00/1M

o3-pro

openai logo
OpenAI
Input Price:Input: $20.00/1MOutput Price:Output: $80.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (1,000,000 tokens)
Less expensive input tokens
Less expensive output tokens
OpenAI

No standout differentiators in the data we have for this pair.

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.4
OpenAI
o3-pro

FAQ

Common questions about GPT-5.4 vs o3-pro.

Which is better, GPT-5.4 or o3-pro?

GPT-5.4 (OpenAI) and o3-pro (OpenAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GPT-5.4 compare to o3-pro in benchmarks?

GPT-5.4 scores Tau2 Telecom: 98.9%, ARC-AGI: 93.7%, Graphwalks BFS <128k: 93.0%, GPQA: 92.8%, Graphwalks parents <128k: 89.8%.

Is GPT-5.4 cheaper than o3-pro?

GPT-5.4 is 8.0x cheaper for input tokens. GPT-5.4 costs $2.50/M input and $15.00/M output via openai. o3-pro costs $20.00/M input and $80.00/M output via openai.

What are the context window sizes for GPT-5.4 and o3-pro?

GPT-5.4 supports 1.0M tokens and o3-pro supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-5.4 and o3-pro?

Key differences include context window (1.0M vs 200K), input pricing ($2.50 vs $20.00/M). See the full comparison above for benchmark-by-benchmark results.

Related comparisons