gpt-5.5
List prices per 1M tokens, what provider caching gives back, and what the cheaper sibling costs for the same work.
$5input / 1M
$30output / 1M
$0.5cached input / 1M (90% off)
nonecache write / 1M (no write surcharge)
Above 272,000 input tokens: $10 in / $45 out / $1 cached.
Same workload, cheaper sibling
100k requests/month of 2,000 input (1,500 static) and 300 output tokens, at list prices. "With cache" assumes the static prefix is served from the provider cache.
| Model | Per request | Per month | With cache | vs gpt-5.5 |
|---|---|---|---|---|
| gpt-5.5 (this model) | $0.019 | $1,900 | $1,225 | — |
| gpt-5.4-mini | $0.00285 | $285 | $183.75 | 85% |
List prices. Cheaper models need an eval before swapping; TokenZero cascade routing is opt-in and advisory by default; an opt-in shadow parity monitor is coming.
Use it through TokenZero
OPENAI_BASE_URL=https://tokenzero.sh/v1 # keep your own key; cache formatting on, routing advisory
Free up to $500/month of routed spend; paid plans are a share of verified savings (Pro Cap: never more than $199/mo). Pricing