Model Comparison

GPT-5.4 vs GPT-5.3 ChatWhich is better in 2026?

Comparing GPT-5.4 and GPT-5.3 Chat across benchmarks, pricing, and capabilities.

Verdict: GPT-5.4 vs GPT-5.3 Chat — which is better?

GPT-5.4 (by OpenAI) and GPT-5.3 Chat (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-5.3 Chat is roughly 1.2x 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…

  • 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-5.3 Chat if…

  • cost matters — it's about 1.2x cheaper per token
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5.4 and GPT-5.3 Chatdon'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-5.3 Chat costs less

For input processing, GPT-5.4 ($2.50/1M tokens) is 1.4x more expensive than GPT-5.3 Chat ($1.75/1M tokens).

For output processing, GPT-5.4 ($15.00/1M tokens) is 1.1x more expensive than GPT-5.3 Chat ($14.00/1M tokens).

In conclusion, GPT-5.4 is more expensive than GPT-5.3 Chat.*

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

Lowest available price from all providers
Fri Jun 19 2026 • llm-stats.com
OpenAI
GPT-5.4
Input tokens$2.50
Output tokens$15.00
Best providerOpenAI
OpenAI
GPT-5.3 Chat
Input tokens$1.75
Output tokens$14.00
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-5.3 Chat's 128,000 tokens. GPT-5.4 can generate longer responses up to 128,000 tokens, while GPT-5.3 Chat is limited to 16,384 tokens.

OpenAI
GPT-5.4
Input1,000,000 tokens
Output128,000 tokens
OpenAI
GPT-5.3 Chat
Input128,000 tokens
Output16,384 tokens
Fri Jun 19 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.4 and GPT-5.3 Chat 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-5.3 Chat

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-5.3 Chat

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while GPT-5.3 Chat was released on 2026-03-04.

GPT-5.4 is 0 month newer than GPT-5.3 Chat.

GPT-5.4

Mar 5, 2026

3 months ago

1d newer
GPT-5.3 Chat

Mar 4, 2026

3 months ago

Knowledge Cutoff

When training data ends

GPT-5.3 Chat has a documented knowledge cutoff of 2025-08-31, while GPT-5.4's cutoff date is not specified.

We can confirm GPT-5.3 Chat's training data extends to 2025-08-31, but cannot make a direct comparison without GPT-5.4's cutoff date.

GPT-5.4

—

GPT-5.3 Chat

Aug 2025

Provider Availability

GPT-5.4 is available from OpenAI. GPT-5.3 Chat is available from OpenAI.

GPT-5.4

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

GPT-5.3 Chat

openai logo
OpenAI
Input Price:Input: $1.75/1MOutput Price:Output: $14.00/1M
* 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)
OpenAI
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.4
OpenAI
GPT-5.3 Chat

FAQ

Common questions about GPT-5.4 vs GPT-5.3 Chat.

Which is better, GPT-5.4 or GPT-5.3 Chat?

GPT-5.4 (OpenAI) and GPT-5.3 Chat (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 GPT-5.3 Chat 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-5.3 Chat scores HealthBench: 54.1%, HealthBench Hard: 25.9%.

Is GPT-5.4 cheaper than GPT-5.3 Chat?

GPT-5.3 Chat is 1.4x cheaper for input tokens. GPT-5.4 costs $2.50/M input and $15.00/M output via openai. GPT-5.3 Chat costs $1.75/M input and $14.00/M output via openai.

What are the context window sizes for GPT-5.4 and GPT-5.3 Chat?

GPT-5.4 supports 1.0M tokens and GPT-5.3 Chat supports 128K 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-5.3 Chat?

Key differences include context window (1.0M vs 128K), input pricing ($2.50 vs $1.75/M). See the full comparison above for benchmark-by-benchmark results.

Related comparisons