Model Cost Profile

OpenAI: GPT-5 Codex

Developer: openai

Pricing updated Mar 11, 2026

Input rank: #260Output rank: #291

Live Pricing

Input: $1.25

Output: $10.00

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Pricing via OpenRouter API · Last synced Mar 11, 2026 · MMLU score via public benchmark data

OpenAI's GPT-5 Codex is designed for advanced programming tasks, enabling developers to generate code snippets, automate debugging, and enhance software development workflows with its extensive 400,000-token context window. Teams utilizing this API model can efficiently handle large codebases and complex queries, making it suitable for applications in machine learning, web development, and data analysis. With an input price of $1.25 per million tokens and an output price of $10.00 per million tokens, organizations can strategically manage costs based on their usage patterns and project requirements.

👁 Vision🔧 Tool Calling📋 Structured Output🧠 Reasoning

Context Window

400,000

Tokens

Input Price / 1M

$1.25

Prompt tokens

Output Price / 1M

$10.00

Completion tokens

Intelligence (MMLU)

86.5

Massive Multitask Language Understanding

Benchmark Scores

Standardized evaluation scores for OpenAI: GPT-5 Codex.

Benchmark	Score	Rank	Source
GPQA	83.7	#9 of 118	artificial_analysis
MMLU	86.5	#6 of 121	artificial_analysis

Side-by-Side Pricing Table

Usage Type	Price / 1M Tokens
Input (Prompt)	$1.25
Output (Completion)	$10.00

Compare with OpenAI: GPT-5 Compare with Deep Cogito: Cogito v2.1 671B Compare with Google: Gemini 2.5 Pro

Price History

OpenAI: GPT-5 Codex Pricing Trend

Input / 1M tokens0.0%Output / 1M tokens0.0%

Mar 7 — Mar 11

Current Input / 1M

$1.25

Current Output / 1M

$10.00

Cost Calculator

Estimate monthly spend for OpenAI: GPT-5 Codex based on your workload.

Input tokens / month

01.0B

Output tokens / month

0500M

Estimated Monthly Cost

$151

25M input + 12M output tokens

Same Workload on Other Models

Arcee AI: Trinity Large Preview (free)$0.00−$151 Arcee AI: Trinity Mini (free)$0.00−$151 Google: Gemma 3 12B (free)$0.00−$151 Google: Gemma 3 27B (free)$0.00−$151

Cheaper Alternatives to Compare

Quick links for cost-down decisions before production rollout.

OpenAI: GPT-5 Codex vs Arcee AI: Trinity Large Preview (free)OpenAI: GPT-5 Codex vs Arcee AI: Trinity Mini (free)OpenAI: GPT-5 Codex vs Google: Gemma 3 12B (free)OpenAI: GPT-5 Codex vs Google: Gemma 3 27B (free)

FAQ

Common pricing and benchmark questions for OpenAI: GPT-5 Codex.

How much does OpenAI: GPT-5 Codex cost per 1M input tokens?

OpenAI: GPT-5 Codex input pricing is $1.25 per 1M tokens based on the latest synced provider data.

How much does OpenAI: GPT-5 Codex cost per 1M output tokens?

OpenAI: GPT-5 Codex output pricing is $10.00 per 1M tokens based on the latest synced provider data.

What context window does OpenAI: GPT-5 Codex support?

OpenAI: GPT-5 Codex supports a context window of 400,000 tokens.

How can I compare OpenAI: GPT-5 Codex with cheaper alternatives?

Use the comparison links on this page to open direct model-vs-model pricing and benchmark pages, then evaluate monthly spend projections for your workload.