Comparison
Claude Sonnet 4.6 vs GPT-5.4 side by side
Compare per-token pricing for Claude Sonnet 4.6 and GPT-5.4. Both run on FrugalDev's prepaid, drop-in-compatible gateway — one key, up to 84% below official list price, no subscription.
Per-token pricing
USD / 1M tokens| Model | Input | Output | Cache R | Cache W | Official I/O | Save |
|---|---|---|---|---|---|---|
| Claude Sonnet 4.6 | $1.37 | $6.80 | $0.13 | $1.70 | $3 / $15 | −55% |
| GPT-5.4 | $0.40 | $2.39 | $0.040 | $0.040 | $2.5 / $15 | −84% |
Frequently asked questions
Is Claude Sonnet 4.6 or GPT-5.4 cheaper?
On FrugalDev, GPT-5.4 has the lower output rate at $2.39/1M tokens. Both are billed per token with no subscription.
Can I use both Claude Sonnet 4.6 and GPT-5.4 with one key?
Yes. A single FrugalDev prepaid key reaches every model on the network — switch between Claude Sonnet 4.6 and GPT-5.4 by changing the model string, with no separate accounts or billing.
Are these the real models?
Yes — both are the same frontier models from Anthropic and OpenAI, reached through our compatible gateway at a fraction of list price.