Model Comparison

GPT-5.4 vs GPT-5Which is better in 2026?

GPT-5.4 significantly outperforms across most benchmarks. GPT-5 is 1.6x cheaper per token.

Verdict: GPT-5.4 vs GPT-5 — which is better?

GPT-5.4 (by OpenAI) and GPT-5 (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 (BrowseComp, FrontierMath, GPQA, Graphwalks BFS <128k, Graphwalks parents <128k, Humanity's Last Exam, MMMU-Pro, Tau2 Telecom), while GPT-5 is better at 0 benchmarks. GPT-5.4 significantly outperforms across most benchmarks.

On price, GPT-5 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 GPT-5 if…

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

Performance Benchmarks

Comparative analysis across standard metrics

8 benchmarks

GPT-5.4 outperforms in 8 benchmarks (BrowseComp, FrontierMath, GPQA, Graphwalks BFS <128k, Graphwalks parents <128k, Humanity's Last Exam, MMMU-Pro, Tau2 Telecom), while GPT-5 is better at 0 benchmarks.

GPT-5.4 significantly outperforms across most benchmarks.

Wed Jul 15 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5 costs less

For input processing, GPT-5.4 ($2.50/1M tokens) is 2.0x more expensive than GPT-5 ($1.25/1M tokens).

For output processing, GPT-5.4 ($15.00/1M tokens) is 1.5x more expensive than GPT-5 ($10.00/1M tokens).

In conclusion, GPT-5.4 is more expensive than GPT-5.*

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

Lowest available price from all providers
Wed Jul 15 2026 • llm-stats.com
OpenAI
GPT-5.4
Input tokens$2.50
Output tokens$15.00
Best providerOpenAI
OpenAI
GPT-5
Input tokens$1.25
Output tokens$10.00
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 GPT-5's 400,000 tokens. Both models can generate responses up to 128,000 tokens.

OpenAI
GPT-5.4
Input1,000,000 tokens
Output128,000 tokens
OpenAI
GPT-5
Input400,000 tokens
Output128,000 tokens
Wed Jul 15 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.4 and GPT-5 support multimodal inputs.

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

GPT-5.4

Text
Images
Audio
Video

GPT-5

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

GPT-5

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while GPT-5 was released on 2025-08-07.

GPT-5.4 is 7 months newer than GPT-5.

GPT-5.4

Mar 5, 2026

4 months ago

7mo newer
GPT-5

Aug 7, 2025

11 months ago

Knowledge Cutoff

When training data ends

GPT-5 has a documented knowledge cutoff of 2024-09-30, while GPT-5.4's cutoff date is not specified.

We can confirm GPT-5's training data extends to 2024-09-30, but cannot make a direct comparison without GPT-5.4's cutoff date.

GPT-5.4

—

GPT-5

Sep 2024

Provider Availability

GPT-5.4 is available from OpenAI. GPT-5 is available from OpenAI.

GPT-5.4

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

GPT-5

openai logo
OpenAI
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M
* 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)
Higher BrowseComp score (82.7% vs 54.9%)
Higher FrontierMath score (47.6% vs 26.3%)
Higher GPQA score (92.8% vs 85.7%)
Higher Graphwalks BFS <128k score (93.0% vs 78.3%)
Higher Graphwalks parents <128k score (89.8% vs 73.3%)
Higher Humanity's Last Exam score (39.8% vs 24.8%)
Higher MMMU-Pro score (81.2% vs 78.4%)
Higher Tau2 Telecom score (98.9% vs 96.7%)
OpenAI
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-5.4 and GPT-5 side-by-side, then vote on the output you prefer.

GPT-5.4
✓ Preferred
GPT-5
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-5.4
OpenAI
GPT-5

FAQ

Common questions about GPT-5.4 vs GPT-5.

Which is better, GPT-5.4 or GPT-5?

GPT-5.4 significantly outperforms across most benchmarks. GPT-5.4 is made by OpenAI and GPT-5 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 GPT-5 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%. GPT-5 scores SWE-Lancer (IC-Diamond subset): 100.0%, COLLIE: 99.0%, Tau2 Telecom: 96.7%, OpenAI-MRCR: 2 needle 128k: 95.2%, AIME 2025: 94.6%.

Is GPT-5.4 cheaper than GPT-5?

GPT-5 is 2.0x cheaper for input tokens. GPT-5.4 costs $2.50/M input and $15.00/M output via openai. GPT-5 costs $1.25/M input and $10.00/M output via openai.

What are the context window sizes for GPT-5.4 and GPT-5?

GPT-5.4 supports 1.0M tokens and GPT-5 supports 400K 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 GPT-5?

Key differences include context window (1.0M vs 400K), input pricing ($2.50 vs $1.25/M). See the full comparison above for benchmark-by-benchmark results.

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