AI & LLM
Token, cost & context tools for LLMs
OpenAI API Cost 2026 — Current GPT-5.5 Pricing
OpenAI pricing has changed substantially with each model generation. These figures are sourced from OpenAI's official API pricing page and last verified on 2026-07-03. GPT-5.5 (the current flagship) is priced at $5.00/M input and $30.00/M output tokens, with cached input at $0.50/M. At the reference workload (1000 input + 500 output tokens), each API call costs $0.02 and 1,000 calls cost $20.00. Use the full calculator with your actual token counts for a current, precise estimate.
GPT-5.5 input: $5.00/M tokens (cached: $0.50/M)
- GPT-5.5 output: $30.00/M tokens
- Reference (1000+500 tokens): $0.02/call
- 1,000 calls: $20.00
- Rates sourced from OpenAI pricing page, verified 2026-07-03
Frequently asked questions
Has OpenAI changed its API pricing in 2026?
Yes — prices have continued to drop with each model generation. GPT-5.5, released in 2026, is priced at $5.00/M input and $30.00/M output — a significant cost reduction versus earlier GPT-4 tiers. Pricing verified 2026-07-03. The calculator pulls from a maintained pricing database updated when OpenAI announces changes.
Does OpenAI prompt caching reduce my API costs?
Yes. OpenAI's prompt caching automatically re-uses the KV cache for identical prompt prefixes across API calls. Cached input tokens cost $0.50/M for GPT-5.5 — 10% of the uncached input rate. Caching is most effective for long system prompts or documents repeated across many calls.