AI & LLM
Token, cost & context tools for LLMs
GPT-5 API Cost Calculator — GPT-5.5 Pricing (Latest)
The GPT-5 family (GPT-5.5, GPT-5.4-mini, GPT-5.4-nano) spans a wide cost range — from GPT-5.4-nano at $0.20/M input to GPT-5.5 at $5.00/M input. GPT-5.5 (the flagship) is priced at $5.00/M input and $30.00/M output as of 2026-07-03. At the reference workload (1,000 in + 500 out): $0.02/call, $20.00 per 1,000 calls. Downgrading to GPT-5.4-mini ($0.75/M in, $4.50/M out) cuts the cost per call to roughly $0.003. Use the full calculator to compare GPT-5 family models side by side on your workload.
GPT-5.5 reference (1000+500 tokens): $0.02/call, $20.00/1,000 calls
- GPT-5.5: $5.00/M input | $30.00/M output
- GPT-5.4-mini: $0.75/M input | $4.50/M output (≈ 7× cheaper input)
- GPT-5.4-nano: $0.20/M input | $1.25/M output (lowest cost GPT-5 family)
- All rates as of 2026-07-03
Frequently asked questions
Which GPT-5 model is cheapest for API usage?
GPT-5.4-nano is the cheapest GPT-5-family model at $0.20/M input and $1.25/M output — roughly 25× less expensive than GPT-5.5 per input token. GPT-5.4-mini ($0.75/M in, $4.50/M out) sits in between and is popular for high-volume chat applications. Use GPT-5.5 for highest quality; downsize to mini or nano when throughput and cost matter more than peak quality.
What is the context window and pricing for GPT-5.5?
GPT-5.5 has a 1,050,000-token context window, max output of 128,000 tokens, input price $5.00/M, output $30.00/M, and cached input $0.50/M. It supports text, image, and file inputs; knowledge cutoff 2025-12-01. Rates as of 2026-07-03.