GPT vs Claude Cost Calculator
Compare the cost of any GPT and Claude model side by side.
With the default inputs, GPT-5 is cheaper by $1,125.00/month — 64.3% difference for this workload. Enter your own numbers below to recompute instantly; the full step-by-step math is shown under the worked example.
Results update automatically as you type.
| GPT-5 | OpenAI | $0.00625 | $625.00 | 128,000 |
| Claude Opus 4.8 | Anthropic | $0.0175 | $1,750.00 | 1,000,000 |
Pick a GPT model and a Claude model, enter your workload, and see which is cheaper per request and per month — with the exact dollar difference. Change either model to compare any two models.
How this is calculated
We cost the same workload on both models — (input × input price + output × output price) per request, scaled by requests per month — and show the per-request and monthly difference with the exact dollar gap. Change either model to compare any two.
Is this a good result? What to do next
Which is cheaper depends on the exact models and your input/output mix; there's no universal winner. Cheaper doesn't mean better — compare quality on your own tasks before deciding.
Typical planning ranges
- Winner depends on
- exact models + token mix
- Output-heavy work
- favours the lower output price
- Price
- one factor, not the only one
Ranges are typical planning figures to sanity-check your result, not authoritative benchmarks. Your numbers will vary with use case, volume, and vendor.
How to improve this number
- Enter your real token mix and volume.
- Compare the tiers you'd actually use, not flagships by default.
- Validate quality on your prompts.
Common mistakes
- Assuming one family is always cheaper.
- Deciding on price without a quality check.
When to use a different approach
To rank all models at once, use the model cost comparison. For one model's bill, use the LLM API cost calculator.
Worked example (defaults)
With the default inputs above, here is the result:
| GPT-5 | OpenAI | $0.00625 | $625.00 | 128,000 |
| Claude Opus 4.8 | Anthropic | $0.0175 | $1,750.00 | 1,000,000 |
Sources & references
Frequently asked questions
Is GPT or Claude cheaper?+
It depends on the exact models and your input/output mix. This calculator shows the real per-request and monthly difference for your workload.
Does cheaper mean better?+
No — compare quality on your own tasks too. Price is only one factor in model choice.
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