3.25
19.5
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GPT-5.4

Built for developers, enterprises, and researchers who demand more.
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GPT-5.4

A high-performance large language model engineered for advanced reasoning, multimodal understanding, long-context processing, and real-world coding tasks.

What exactly is GPT-5.4 API?

Unlike earlier GPT models that optimized primarily for fluency, GPT-5.4 pushes the frontier on structured reasoning and multi-step problem solving. It's not just generating plausible text, it's working through problems the way a thoughtful analyst would, weighing evidence, catching contradictions, and arriving at well-grounded conclusions.

The model is designed to operate at scale across enterprise workflows, developer toolchains, and research environments, handling everything from a quick summarization task to a multi-document analysis spanning thousands of tokens in a single pass.

API Pricing

  • Input: $3.25
  • Cached input: $0.33
  • Output: $19.50

Technical specifications

For developers and engineers evaluating GPT-5.4 for integration, here's a closer look at what the model brings to the table technically.

  • Model family: GPT-5 series (OpenAI)
  • Architecture: Transformer-based autoregressive language model with RLHF fine-tuning
  • Modalities: Text + image input; text output
  • Context window: 128,000+ tokens — supports book-length documents in a single pass
  • Output length: Extended output with coherence maintained across thousands of tokens
  • Supported languages: 100+ natural languages; strong multilingual performance
  • Primary use cases: Reasoning, coding, analysis, document QA, conversational AI, agentic tasks

Core capabilities at a glance

GPT-5.4 was built around four pillars — reasoning, code, multimodal input, and long-context retrieval. Here's what that means in practice.

Advanced reasoning

Multi-step logical inference, chain-of-thought decomposition, and structured problem-solving across math, science, and strategy domains.

Code generation & debugging

Produces production-ready code across 40+ languages, explains complex bugs with precision, and architects software systems from scratch.

Multimodal input

Understands and reasons over images alongside text from chart interpretation to diagram analysis to visual QA over uploaded documents.

Long-context processing

Handles extremely long inputs, contracts, codebases, research papers, without losing coherence or detail buried deep in the context window.

Conversational depth

Sustains coherent, nuanced dialogue over long sessions, maintaining context, tracking intent, and adapting tone without losing thread.

Instruction following

Reliably follows complex, layered prompts with multiple constraints, critical for structured outputs, agent pipelines, and API automation.

Who is GPT-5.4 built for?

GPT-5.4 is a professional-grade model. It's not a casual chatbot, it's infrastructure. The use cases where it genuinely shines reflect that positioning.

  • Software developers: Generating, debugging, and reviewing code across languages and frameworks, including architecture decisions and refactoring at scale.
  • Research & academia: Literature synthesis, hypothesis analysis, structured summarization, and working through complex multi-source datasets.
  • Product & content teams: High-quality long-form writing, structured content generation, tone-consistent brand copy, and multilingual localization.
  • Data & analytics: Natural language to SQL, report narration, insight extraction from large datasets, and analytical reasoning over structured inputs.

When to stick with GPT-4o or smaller models

GPT-5.4 is not always the right tool. For high-volume, latency-sensitive tasks — simple classification, short-form Q&A, real-time chat — a lighter model often makes more sense on cost and speed. GPT-5.4 earns its place when output quality is mission-critical and the task genuinely demands deep reasoning or long-context comprehension.

What exactly is GPT-5.4 API?

Unlike earlier GPT models that optimized primarily for fluency, GPT-5.4 pushes the frontier on structured reasoning and multi-step problem solving. It's not just generating plausible text, it's working through problems the way a thoughtful analyst would, weighing evidence, catching contradictions, and arriving at well-grounded conclusions.

The model is designed to operate at scale across enterprise workflows, developer toolchains, and research environments, handling everything from a quick summarization task to a multi-document analysis spanning thousands of tokens in a single pass.

API Pricing

  • Input: $3.25
  • Cached input: $0.33
  • Output: $19.50

Technical specifications

For developers and engineers evaluating GPT-5.4 for integration, here's a closer look at what the model brings to the table technically.

  • Model family: GPT-5 series (OpenAI)
  • Architecture: Transformer-based autoregressive language model with RLHF fine-tuning
  • Modalities: Text + image input; text output
  • Context window: 128,000+ tokens — supports book-length documents in a single pass
  • Output length: Extended output with coherence maintained across thousands of tokens
  • Supported languages: 100+ natural languages; strong multilingual performance
  • Primary use cases: Reasoning, coding, analysis, document QA, conversational AI, agentic tasks

Core capabilities at a glance

GPT-5.4 was built around four pillars — reasoning, code, multimodal input, and long-context retrieval. Here's what that means in practice.

Advanced reasoning

Multi-step logical inference, chain-of-thought decomposition, and structured problem-solving across math, science, and strategy domains.

Code generation & debugging

Produces production-ready code across 40+ languages, explains complex bugs with precision, and architects software systems from scratch.

Multimodal input

Understands and reasons over images alongside text from chart interpretation to diagram analysis to visual QA over uploaded documents.

Long-context processing

Handles extremely long inputs, contracts, codebases, research papers, without losing coherence or detail buried deep in the context window.

Conversational depth

Sustains coherent, nuanced dialogue over long sessions, maintaining context, tracking intent, and adapting tone without losing thread.

Instruction following

Reliably follows complex, layered prompts with multiple constraints, critical for structured outputs, agent pipelines, and API automation.

Who is GPT-5.4 built for?

GPT-5.4 is a professional-grade model. It's not a casual chatbot, it's infrastructure. The use cases where it genuinely shines reflect that positioning.

  • Software developers: Generating, debugging, and reviewing code across languages and frameworks, including architecture decisions and refactoring at scale.
  • Research & academia: Literature synthesis, hypothesis analysis, structured summarization, and working through complex multi-source datasets.
  • Product & content teams: High-quality long-form writing, structured content generation, tone-consistent brand copy, and multilingual localization.
  • Data & analytics: Natural language to SQL, report narration, insight extraction from large datasets, and analytical reasoning over structured inputs.

When to stick with GPT-4o or smaller models

GPT-5.4 is not always the right tool. For high-volume, latency-sensitive tasks — simple classification, short-form Q&A, real-time chat — a lighter model often makes more sense on cost and speed. GPT-5.4 earns its place when output quality is mission-critical and the task genuinely demands deep reasoning or long-context comprehension.

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