OpenAI Price Calculator
Free interactive OpenAI API cost calculator covering 50+ models from GPT-5.6 to GPT-4o.
The most comprehensive free OpenAI cost calculator we've seen, covering 50+ models including the newest GPT-5.6 family. Perfect for quick budgeting, but don't expect billing integration or historical tracking. Pair it with OpenRouter for multi-provider comparisons.
Verified 4d ago · liveness 54/100 · cite: rightaichoice.com/tools/openai-price-calculator
- Developers estimating API costs for new features or projects
- Content creators budgeting text generation expenses
- Businesses planning AI-powered workflows and cost projections
- Freelancers and agencies quoting AI project costs
- Users needing cost estimation for non-OpenAI providers
- Those looking for real-time billing or usage tracking
- Enterprise customers needing custom pricing or volume discounts
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Skip the OpenAI Price Calculator if you need actual API billing integration, historical usage tracking, or multi-provider comparisons — it only does point-in-time estimates for OpenAI models.
Free, so it appeals to any developer or business budgeting OpenAI API spend. The only cost is your time to update token estimates and check rates manually; there's no paid tier.
In short
OpenAI Price Calculator — Free interactive OpenAI API cost calculator covering 50+ models from GPT-5.6 to GPT-4o. Best for Developers estimating API costs for new features or projects, Content creators budgeting text generation expenses, Businesses planning AI-powered workflows and cost projections. Free to use.
Viability Score
How well maintained and how widely used is OpenAI Price Calculator? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: September 2026
How we score →Key Features
- Cost estimation for over 50 OpenAI models
- Support for GPT-5.6 Sol, Terra, Luna
- Support for GPT-5.5, GPT-5.5-pro, GPT-5.4 pro, GPT-5.4, GPT-5.2 pro, GPT-5.2, GPT-5.1
- Support for GPT-5 pro, GPT-5, GPT-5 mini, GPT-5 nano
- Support for o3-pro, o3, o4-mini
- Support for GPT-4.1, GPT-4.1 mini, GPT-4.1 nano
- Support for O1 Pro, O1, O3-mini, GPT-4o, GPT-4o mini
- Support for GPT-4o Search Preview, GPT-4o mini Search Preview
- Support for real-time models (gpt-realtime, gpt-realtime-mini) with text and audio pricing
- Support for Deep Research models (o3 Deep Research, o4-mini Deep Research)
- Input token cost per million tokens
- Output token cost per million tokens
- Input caching cost support
- Real-time calculation with instant results
- Interactive sliders for input and output tokens
About OpenAI Price Calculator
The OpenAI Price Calculator by InvertedStone is a free, interactive tool for estimating API costs across OpenAI's model lineup, including the latest GPT-5.6 Sol, Terra, Luna, GPT-5.5, o3-pro, o4-mini, and real-time models. Simply select a model, input token counts (or use sliders), and the calculator instantly returns input, output, and total costs based on current per-million-token rates. It also accounts for input caching discounts where available. Designed for developers, content creators, and businesses that rely on OpenAI's API, the calculator eliminates guesswork with a clean interface and real-time updates. It covers over 50 distinct models, from flagship reasoning models like o3-pro to cost-efficient nano variants and multimodal models like GPT-4o Search Preview. The pricing data is regularly updated to reflect OpenAI's official rates, making it reliable for budgeting and financial planning. The calculator also includes a word-to-token conversion reference and supports caching optimization tips. Beyond the calculator, InvertedStone offers related resources such as Multi-AI scripts for Google Sheets and Airtable, blog posts on cost reduction, and other model-specific calculators (Claude, Gemini, Cohere, DALL-E, Whisper). It's a no-nonsense tool for anyone needing fast, accurate cost estimation without signing up, but it lacks multi-provider comparisons or usage tracking.
Behind the Verdict
The OpenAI Price Calculator from InvertedStone is a straightforward, free web tool that does one thing well: estimate the cost of OpenAI API calls. You pick a model from a dropdown that lists over 50 current and legacy OpenAI models—from the flagship GPT-5.6 Sol down to GPT-4o mini and the real-time audio models—and the tool shows you the per-million-token input and output rates. You then either type in your anticipated token counts or adjust sliders, and it instantly calculates the total cost, with a breakdown of input, output, and (if you toggle it on) cached-input savings. The interface is clean and fast, with no sign-up required. The pricing table is the heart of the tool and it's genuinely current: it lists the latest rates as of this writing, including the GPT-5.6 family at $5/$30 per million tokens for Sol, $2.50/$15 for Terra, and $1/$6 for Luna. It also covers the real-time models (gpt-realtime and gpt-realtime-mini) with separate text and audio rates, plus Deep Research variants. This makes it a handy reference for anyone budgeting an OpenAI-powered project. But the tool has clear limits: it doesn't track your actual usage, it doesn't compare across providers, and it won't help you forecast for large enterprise discounts. For that, you'd need a purpose-built FinOps platform like Vantage or Toggl. InvertedStone offsets some of that by selling Google Sheets and Airtable scripts (Multi-AI) that connect to OpenRouter, letting you pull live pricing and run models across providers. The calculator is best as a quick, trusty sketchpad for cost estimation—not a billing dashboard. If you're a solo developer or a small team pricing out a prototype, it's ideal. If you need usage-based alerts or historical trending, look elsewhere.
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Real-world workflow fit
Concrete scenarios for the personas OpenAI Price Calculator actually fits — and what changes day-one when you adopt it.
You're building a customer-support chatbot on GPT-5.5 and need to know monthly API costs before pitching your client.
Outcome: You enter expected monthly input and output tokens (say 1M input, 100K output) and see an instant estimate of $5 for input plus $3 for output, so you can quote accurately.
You plan to generate 10,000 product descriptions at roughly 200 tokens each and want to compare GPT-4o mini vs GPT-5.6 Luna.
Outcome: You quickly toggle between models in the calculator, seeing Luna at $1/1M input and $6/1M output vs GPT-4o mini at $0.15/1M input and $0.60/1M output, and decide to use the cheaper option for bulk.
You're evaluating gpt-realtime vs gpt-realtime-mini for a voice application and need audio pricing side by side.
Outcome: The calculator shows realtime at $32/1M audio input and $64/1M audio output, while mini is $10/$20, so you choose mini for your pilot.
Use Cases
- Estimate costs before building a chatbot that uses GPT-5.5.
- Compare pricing across GPT-5.4, o4-mini, and GPT-4.1 for a text generation project.
- Budget API spend for a content pipeline generating thousands of product descriptions.
- Plan token usage for a real-time application using gpt-realtime models.
- Determine whether input caching reduces costs for your repetitive prompts.
Models Under the Hood
as of 2026-09-25
Limitations
- This is a free static web calculator that lets users enter estimated input and output token counts to project costs; it does not connect to an OpenAI account or track actual API usage.
- Cost figures come from manually maintained published rates and may lag behind price changes or ignore enterprise/volume discounts, and some models (e.g. caching) are only partially supported.
- It covers OpenAI models exclusively, not other providers such as Claude or Gemini.
as of 2026-09-09
Verification history
We have re-verified OpenAI Price Calculator 9 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-checked, vendor evidence unchanged
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Showing the 6 most recent of 9 verification passes.
Free to cite with attribution — this page re-verifies continuously.
Where the pricing makes sense
The company stage and team size where OpenAI Price Calculator's pricing actually pencils out — and where peers do it cheaper.
Free, so it appeals to any developer or business budgeting OpenAI API spend. The only cost is your time to update token estimates and check rates manually; there's no paid tier.
Setup time & first value
How long it actually takes to get something useful out of OpenAI Price Calculator — broken out by persona, not the marketing-page minute.
No sign-up required; you can run your first calculation in under a minute. Simply select a model, enter token counts, and read the result. For detailed multi-model comparisons, expect a few minutes to toggle through models.
Integrations
Resources & Guides
Tutorials & Learning
YouTube returned 6 videos for “OpenAI Price Calculator”, and we withheld 6: 6 did not mention OpenAI Price Calculator. We are showing none, because we could not prove any of them are about OpenAI Price Calculator.
Official links
Featured Head-to-Head Comparisons
Openai Price Calculator vs Spider Cloud
These tools serve completely different needs. OpenAI Price Calculator is a must-have free budgeting tool if you use OpenAI APIs. Spider Cloud is a powerful, low-cost web scraping platform ideal for AI agents and RAG pipelines. Choose based on whether you need cost estimation or web data extraction.
Openai Price Calculator vs Temporal Ai
If you need to reliably orchestrate multi-step AI agents with automatic retry and state persistence, choose Temporal. If you need to accurately estimate OpenAI API costs before building, the OpenAI Price Calculator is the tool. They serve completely different needs; pick based on whether you are building or budgeting.
Openai Price Calculator vs Voyage Ai
Voyage AI and OpenAI Price Calculator serve fundamentally different needs and are not direct competitors. Voyage AI provides production-grade embedding and reranker models for enterprises building RAG systems, while OpenAI Price Calculator is a free budgeting tool for estimating API costs. Choose Voyage AI if you need domain-specific, high-accuracy retrieval with long-context support; choose the calculator if you need to forecast OpenAI API expenses. Most users will benefit from both: Voyage AI for the actual retrieval pipeline and the calculator for cost planning.
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