AI Cost Calculator / Comparison
Which is cheaper for your workload: Gpt 5.4 or Claude Sonnet 5? Both are scored against the same three canonical workloads below using per-1M-token list pricing as of 2026-08-15. Claude Sonnet 5 is cheaper in 3 of 3 workloads — but your own token mix decides, so open the calculator with your numbers.
| Workload | Gpt 5.4 | Claude Sonnet 5 | Cheaper | Try it |
|---|---|---|---|---|
Chat assistant 1.2K input / 400 output tokens per call, light prompt caching, 500 calls/day. | $138.00/mo | $98.40/mo | Claude Sonnet 5 | Open in calculator |
Long-context RAG 100K input / 500 output tokens per call, heavy cache reads, 200 calls/day. | $1635.00/mo | $1302.00/mo | Claude Sonnet 5 | Open in calculator |
Bulk classification 3K input / 20 output tokens per call, no caching, 100K calls/day. | $23400.00/mo | $18600.00/mo | Claude Sonnet 5 | Open in calculator |
| Model | Input /1M | Output /1M | Cache read /1M | Cache write /1M | Context | Source |
|---|---|---|---|---|---|---|
| Gpt 5.4 frontier | $2.50 | $15.00 | $0.250 | — | 1,050,000 | OpenAI |
| Claude Sonnet 5 frontier | $2.00 | $10.00 | $0.200 | $2.50 | 1,000,000 | Anthropic |
Cache rates of — mean the provider has not published that tier. Batch API discounts (typically 50%) and negotiated rates are not included — toggle Batch mode in the calculator for those.
Token mix, caching, and volume flip the ranking constantly. Enter your real numbers and compare Gpt 5.4 vs Claude Sonnet 5 side by side — free, no account, runs in your browser.
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