OpenAI Pricing Calculator
Updated August 2026Estimate costs for GPT-6 Astra, GPT-5.6 Sol, GPT-5.6 Terra, GPT-5.6 Luna, GPT-5.5, GPT-5.5 Pro, GPT-5.4, GPT-5.2, GPT-5 nano, GPT-4.1, o3, and other OpenAI models based on your token usage.
OpenAI pricing: OpenAI pricing 2026: ChatGPT Free, Go $8, Plus $20, Pro $100 & $200/mo, Business $20/seat, plus the GPT-5.6 API (Sol/Terra/Luna) from $0.20/1M tokens. Use the free calculator below to enter your usage and get an instant all-in monthly estimate — including overages — and see which plan is cheapest for your needs.
How OpenAI prices: Freemium subscription (ChatGPT Free/Go/Plus/Pro/Business/Enterprise) + pure-usage API (pay-per-token).
Best fit at your usage: GPT-5 nano
$0.75/mo— saves $104.25/mo vs your selection
Token Usage
Average number of tokens you send per API call
Average number of tokens the model generates per call
Request Volume
How many API calls do you make daily?
Compare Plans at Your Usage
Monthly Estimate
GPT-6 Astra
$105.00
per month
Cost Breakdown
Daily
$3.50
Annual
$1,260.00
Why GPT-5 nano — $0.75/mo
- GPT-5 nano at $0.75/mo.
- Output tokens is 80% of your bill — the lever that matters most.
Budget range
Plan for usage swings, not just today's estimate.
Conservative
$90.00
500 tokens/mo
Expected
$105.00
1K tokens/mo
Aggressive
$135.00
2K tokens/mo
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Get StartedAbout this OpenAI calculator
This calculator estimates your OpenAI cost from publicly available pricing. Actual costs may vary with your specific agreement, volume discounts, and usage patterns — always verify on the provider's official pricing page for the most current rates.
OpenAI pricing — frequently asked questions
How much does ChatGPT cost per month? ▼
ChatGPT consumer tiers are: Free ($0), Go ($8/month), Plus ($20/month), and Pro (two tiers, $100/month and $200/month). For teams, ChatGPT Business is $20/seat/month billed annually (or $25/seat billed monthly) with a 2-seat minimum. Enterprise pricing is custom and requires contacting sales.
What is the difference between ChatGPT Plus and Pro? ▼
ChatGPT Plus ($20/mo) gives expanded model access, Advanced Voice Mode, image generation, and larger usage limits than the free tier. ChatGPT Pro ($100/mo or $200/mo) layers on much higher usage limits and Pro-mode reasoning — a significantly higher-compute configuration — plus priority access to new models, with the $200 tier offering the highest limits.
How does OpenAI API pricing work? ▼
OpenAI API pricing is pure pay-per-token: you pay for input tokens (the prompt + context) and output tokens (the generated response) separately, per model. As of August 26, 2026, the headline lineup is the GPT-5.6 flagship line — Luna ($0.20/1M input, $1.20/1M output), Terra ($2.00/$12.00), and Sol ($4.00/$20.00, on a promotional rate through November 21, 2026) — with prior GPT-5.5/5.4/mini/nano (from $0.20/1M input) still available. Batch API requests cost 50% less; cached input tokens are billed at a reduced cached-input rate.
Which OpenAI model is cheapest? ▼
GPT-5.6 Luna is OpenAI's cheapest current model at $0.20/1M input and $1.20/1M output, after an 80% price cut on August 26, 2026 — it now slightly undercuts the older GPT-5.4 nano ($0.20/$1.25), which remains available via the API. GPT-5.4 mini ($0.75/$4.50) is a step up and is generally preferred when a small model needs stronger coding or tool-use ability.
Is this OpenAI pricing calculator free and accurate? ▼
Yes — it's completely free with no signup. It uses the latest publicly available OpenAI pricing (verified August 2026). Actual costs may vary with volume discounts or enterprise terms — always confirm on OpenAI's official pricing page.