ZMIME
OpenAI · Released Mar 5, 2026

GPT-5.4 Pro

More exact GPT-5.4 tier for demanding professional reasoning and agent tasks.

  • Proprietary
  • Reasoning
  • Tool calling
  • Vision
Capability
159.1ECI · #11 of 148
Input
$30.00per 1M tokens
Output
$180.00per 1M tokens
Context
1.05M128K max output
Pricing

What it costs

Input
$30.00per million tokens
Output
$180.00per million tokens
Over 272K tokens
$60.00 / $270.00input / output per million
Blended (3:1)
$67.50pricier than 99% of priced models

Typical monthly bills

Monthly usageEstimated cost
Side project2M input + 0.5M output tokens$150.00
Team assistant25M input + 5M output tokens$1,650
Production app250M input + 50M output tokens$16,500

Official OpenAI API price, as listed on models.dev.

Capability

Independent benchmarks

159.1Epoch Capabilities Index
#11 of 148 scored models
88Median 146167

The shaded band is Epoch AI’s confidence range (156.5–161.9); the tick marks the median scored model.

  • GPQA DiamondGraduate-level science questions · xhigh setting94.6%
  • FrontierMath Tiers 1–3Research-level mathematics · xhigh setting82.5%
  • SimpleQA VerifiedShort factual questions · xhigh setting46.3%

Scores from Epoch AI, run independently of OpenAI.

Specifications

The details

Lab
OpenAI
Released
Mar 5, 2026
Knowledge cutoff
Aug 31, 2025
Context window
1,050,000 tokens
Max output
128,000 tokens
Inputs
Text, Images
Output
Text
Reasoning
Adjustable effort medium · high · xhigh
Tool calling
Yes
Structured output
No
Weights
Proprietary
API model ID
gpt-5.4-proon OpenAI
Availability
16 API providerslisted on models.dev

OpenAI model documentation

Lab-reported

What OpenAI claims

Published by the lab at launch. Settings vary, so compare these only with care.

BenchmarkScoreSettingSource
GPQA Diamond94.4—Source
Humanity's Last Exam42.7no toolsSource
Humanity's Last Exam58.7with toolsSource
BrowseComp89.3—Source
GDPval82 wins or ties—Source
FrontierMath50—Source
FrontierMath38—Source
ARC-AGI-194.5VerifiedSource
ARC-AGI-283.3VerifiedSource
FinanceAgent v1.161.5—Source
GeneBench25.6—Source
Same lab

More from OpenAI

Questions

About GPT-5.4 Pro

How much does GPT-5.4 Pro cost?

GPT-5.4 Pro costs $30.00 input / $180.00 output per million tokens (official OpenAI API price). Requests over 272K tokens are billed at $60.00 input / $270.00 output. At a 3:1 input-to-output mix that is $67.50 per million tokens, more expensive than 99% of the 360 priced models we track.

What is the context window of GPT-5.4 Pro?

GPT-5.4 Pro accepts up to 1,050,000 tokens per request and can write up to 128,000 tokens in one response.

How good is GPT-5.4 Pro?

Epoch AI gives GPT-5.4 Pro a Capabilities Index score of 159.1 (likely range 156.5–161.9), ranking it #11 of 148 models Epoch has scored. Epoch AI benchmark results: GPQA Diamond 94.6%, FrontierMath Tiers 1–3 82.5%, SimpleQA Verified 46.3%.

Is GPT-5.4 Pro open source?

No. GPT-5.4 Pro is proprietary; you use it through OpenAI’s API or partner platforms.

What inputs does GPT-5.4 Pro support?

GPT-5.4 Pro accepts text and images and replies in text. It is a reasoning model with medium, high and xhigh effort settings, supports tool calling.

When was GPT-5.4 Pro released?

OpenAI released GPT-5.4 Pro on Mar 5, 2026. Its training data runs to Aug 31, 2025.

What are the best alternatives to GPT-5.4 Pro?

The closest current models from other labs on capability, price and release date are Claude Fable 5 (Anthropic, ECI 162.2, $10.00 / $50.00), Kimi K3 (Moonshot AI, ECI 157.6, $3.00 / $15.00), Gemini 3.1 Pro Preview (Google, ECI 154.8, $2.00 / $12.00) and Qwen3.8 Max (Alibaba (Qwen), ECI 156.6, $2.00 / $6.00).