GPT-5.4 is OpenAI's latest flagship model with a 1M+ context window, 128K output tokens, and top-tier performance across all task types.

How is GPT-5.4 different from GPT-5.2?

GPT-5.4 has a much larger context window (1M vs 128K), more output tokens (128K vs 16K), and improved reasoning and reliability.

Is GPT-5.4 included in NinjaChat plans?

Every NinjaChat plan includes GPT-5.4: create an account, choose a plan and pick GPT-5.4 in the model list. No separate OpenAI subscription is needed.

What's GPT-5.4's context window?

1,050,000 tokens — one of the largest available, allowing processing of very long documents and conversations.

Is GPT-5.4 better than Claude?

Both excel at different tasks. GPT-5.4 has a larger context window; Claude excels at nuanced analysis. Try both on NinjaChat to compare.

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OpenAI

Chat with GPT 5.4

GPT-5.4 is OpenAI's latest flagship language model, featuring a groundbreaking 1,050,000 token context window and up to 128,000 output tokens. Released in March 2026, it represents a significant leap in capability, speed, and reliability.

Try GPT 5.4 See plans

Trusted by 790,000+ users

1.05M tokens

Context

August 31, 2025

Knowledge cutoff

128,000 tokens

Max output

Balanced

Speed

Build with GPT 5.4 via APIgpt-5.4 · $2.5 / $15 per 1M tokensAPI pricing & docs →

What you’ll use it for

Long Document Analysis

Process and analyze massive documents with the 1M+ context window.

Advanced Coding

Write, debug, and architect code across all programming languages.

Creative Writing

Generate stories, scripts, and creative content with nuanced output.

Research & Analysis

Deep analytical reasoning for complex multi-step problems.

Prompts to steal

Tuned to this model — click any line to copy.

About GPT 5.4

GPT-5.4 excels at complex reasoning, code generation, creative writing, and multimodal understanding including vision. It supports structured outputs, function calling, and distillation, making it ideal for both interactive use and production applications.

On NinjaChat, GPT-5.4 is included in every plan, alongside Claude Sonnet 4.6, Gemini 3 Pro, and 25+ other AI models without needing a ChatGPT Plus subscription.

How to use GPT 5.4

From zero to your first result in under a minute.

Create a NinjaChat account and choose a plan

Navigate to the chat interface

Select 'GPT 5.4' from the model dropdown

Upload long documents or start chatting

Compare with other models to find your preference

Tips for better results

Great for processing very long documents
Use detailed prompts for best results
Excellent for code generation and review

GPT 5.4 vs the alternatives

Where it wins, and where it doesn't.

vs GPT-5.2

8x larger context window, 8x more output tokens, improved reasoning

GPT-5.2 is cheaper and faster for simpler tasks

vs Claude Sonnet 4.6

View

Larger context (1M vs 200K), larger output (128K)

Claude excels at careful analysis and writing

Questions, answered.

Beyond chat — images & video

The same subscription covers the image studio and video generation.

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GPT 5.4, and 50 more.

One subscription covers every model on NinjaChat, GPT 5.4 included.

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Developer API

Chat with GPT 5.4