Model Comparison

GPT-5.4 vs o3Which is better in 2026?

GPT-5.4 significantly outperforms across most benchmarks. o3 is 1.6x cheaper per token.

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

GPT-5.4 (by OpenAI) and o3 (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 8 benchmarks (ARC-AGI, ARC-AGI v2, BrowseComp, FrontierMath, GPQA, Humanity's Last Exam, MMMU-Pro, Tau2 Telecom), while o3 is better at 0 benchmarks. GPT-5.4 significantly outperforms across most benchmarks.

On price, o3 is roughly 1.6x 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 8 of 8 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 if…

  • cost matters — it's about 1.6x cheaper per token
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Performance Benchmarks

Comparative analysis across standard metrics

8 benchmarks

GPT-5.4 outperforms in 8 benchmarks (ARC-AGI, ARC-AGI v2, BrowseComp, FrontierMath, GPQA, Humanity's Last Exam, MMMU-Pro, Tau2 Telecom), while o3 is better at 0 benchmarks.

GPT-5.4 significantly outperforms across most benchmarks.

Sun Jun 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

o3 costs less

For input processing, GPT-5.4 ($2.50/1M tokens) is 1.3x more expensive than o3 ($2.00/1M tokens).

For output processing, GPT-5.4 ($15.00/1M tokens) is 1.9x more expensive than o3 ($8.00/1M tokens).

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

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

Lowest available price from all providers
Sun Jun 07 2026 • llm-stats.com
OpenAI
GPT-5.4
Input tokens$2.50
Output tokens$15.00
Best providerOpenAI
OpenAI
o3
Input tokens$2.00
Output tokens$8.00
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's 200,000 tokens. GPT-5.4 can generate longer responses up to 128,000 tokens, while o3 is limited to 100,000 tokens.

OpenAI
GPT-5.4
Input1,000,000 tokens
Output128,000 tokens
OpenAI
o3
Input200,000 tokens
Output100,000 tokens
Sun Jun 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.4 and o3 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

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

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while o3 was released on 2025-04-16.

GPT-5.4 is 11 months newer than o3.

GPT-5.4

Mar 5, 2026

3 months ago

10mo newer
o3

Apr 16, 2025

1.1 years ago

Knowledge Cutoff

When training data ends

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

We can confirm o3'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

May 2024

Provider Availability

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

GPT-5.4

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

o3

openai logo
OpenAI
Input Price:Input: $2.00/1MOutput Price:Output: $8.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (1,000,000 tokens)
Higher ARC-AGI score (93.7% vs 88.0%)
Higher ARC-AGI v2 score (73.3% vs 6.5%)
Higher BrowseComp score (82.7% vs 49.7%)
Higher FrontierMath score (47.6% vs 15.8%)
Higher GPQA score (92.8% vs 83.3%)
Higher Humanity's Last Exam score (39.8% vs 14.7%)
Higher MMMU-Pro score (81.2% vs 76.4%)
Higher Tau2 Telecom score (98.9% vs 58.2%)
OpenAI
Less expensive input tokens
Less expensive output tokens
OpenAIGPT-5.4
OpenAIo3
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Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.4
OpenAI
o3

FAQ

Common questions about GPT-5.4 vs o3.

Which is better, GPT-5.4 or o3?

GPT-5.4 significantly outperforms across most benchmarks. GPT-5.4 is made by OpenAI and o3 is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-5.4 compare to o3 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%. o3 scores COLLIE: 98.4%, AIME 2024: 91.6%, ARC-AGI: 88.0%, MathVista: 86.8%, AIME 2025: 86.4%.

Is GPT-5.4 cheaper than o3?

o3 is 1.3x cheaper for input tokens. GPT-5.4 costs $2.50/M input and $15.00/M output via openai. o3 costs $2.00/M input and $8.00/M output via openai.

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

GPT-5.4 supports 1.0M tokens and o3 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?

Key differences include context window (1.0M vs 200K), input pricing ($2.50 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

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