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5 models across 3 tiers

GPT API pricing in 2026

OpenAI offers models across three tiers: flagship (GPT 5.5, GPT 5.6 Sol), mid-tier (GPT 5.4, GPT 5.6 Terra), and fast (GPT 5.6 Luna). The GPT 5.6 family launched with 1M context windows across all tiers. OpenAI provides 90% cache read discounts on newer models.

Models

5

Cheapest input

$1.00/MTok

Cache discount

90% off

Max context

1,000K

All GPT models

ModelTierInput $/MTokOutput $/MTokContextBest taskReleased
GPT 5.6 LunaFast / Budget$1.00$6.001,000KClassification (91/100)Jul 2026
GPT 5.4Mid-tier$2.50$15.00128KSummarization (91/100)Mar 2026
GPT 5.6 TerraMid-tier$2.50$15.001,000KSummarization (92/100)Jul 2026
GPT 5.5Flagship$5.00$30.00128KReasoning (95/100)Mar 2026
GPT 5.6 SolFlagship$5.00$30.001,000KReasoning (96/100)Jul 2026

GPT cost by use case

Estimated cost per API call across common workloads, using default token counts for each use case.

Use caseLuna5.4Terra5.5Sol
Code Generation$0.0260$0.0650$0.0650$0.1300$0.1300
Unit Test Generation$0.0330$0.0825$0.0825$0.1650$0.1650
SQL Generation$0.007500$0.0187$0.0187$0.0375$0.0375
API Generation$0.0390$0.0975$0.0975$0.1950$0.1950
Code Refactoring$0.0280$0.0700$0.0700$0.1400$0.1400
Code Review$0.0170$0.0425$0.0425$0.0850$0.0850
PR Review$0.0260$0.0650$0.0650$0.1300$0.1300
Security Review$0.0210$0.0525$0.0525$0.1050$0.1050
Bug Detection$0.0170$0.0425$0.0425$0.0850$0.0850
Document Summarization$0.0160$0.0400$0.0400$0.0800$0.0800
PDF Summarization$0.0240$0.0600$0.0600$0.1200$0.1200
Meeting Notes$0.0200$0.0500$0.0500$0.1000$0.1000

GPT quality benchmarks by task

Confidence scores (0-100) across all task types. Higher is better.

TaskLuna5.4Terra5.5Sol
Code Generation70/10084/10086/10091/10094/100
Code Review68/10082/10084/10090/10092/100
Summarization84/10091/10092/10089/10090/100
Q&A85/10091/10092/10090/10091/100
Extraction89/10089/10090/10087/10088/100
Reasoning63/10080/10082/10095/10096/100
Classification91/10088/10089/10085/10086/100
Creative Writing58/10078/10080/10091/10092/100

Recent GPT pricing changes

GPT 5.6 Sol input launched

$5.00/MTok at launch

Jul 9, 2026

GPT 5.5 input decreased

$6.00 to $5.00/MTok

Jun 1, 2026

GPT 5.5 input decreased

$7.50 to $6.00/MTok

May 15, 2026

View full GPT pricing history

Compare GPT with other providers

Claude

5 models from $1.00/MTok

Gemini

4 models from $0.25/MTok

Head-to-head comparisons

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