gpt-5.5 · OpenAI
Previous flagship generation, still fully supported at $5/$30 with the 1.05M context window — now effectively superseded by 5.6 Sol pricing.
Last checked Aug 16, 2026. Calculations use the listed base rates; provider-specific tiers, cache writes, batch pricing, and long-context rules may differ. Note: Long-context requests bill at 2× ($10/$45). Confirm the current rate at the official provider source.
Input
$5.00
per 1M tokens
Output
$30.00
per 1M tokens
Cached input
$0.50
per 1M tokens
Context window
1.1M
max output 128K
GPT-5.5 cost calculator
What GPT-5.5 costs per task
| Use case | Input tokens | Output tokens | Cost / request | Monthly @ 1K req/day |
|---|---|---|---|---|
| Customer support chatbot | 3,500 | 350 | $0.017 | $509.25 |
| RAG / search-augmented answers | 8,000 | 500 | $0.037 | $1,110.00 |
| AI coding assistant | 12,000 | 2,000 | $0.0876 | $2,628.00 |
| Document summarization | 25,000 | 600 | $0.1317 | $3,952.50 |
| Agentic workflow | 40,000 | 1,500 | $0.128 | $3,840.00 |
| Content generation | 800 | 1,200 | $0.0389 | $1,167.60 |
| Data extraction & tagging | 2,000 | 250 | $0.0157 | $471.00 |
| Translation | 5,000 | 5,500 | $0.1866 | $5,598.75 |
Assumes each use case's typical cacheable share of input. See full cost scenarios.
Compare with alternatives
| Model | Input /M | Output /M | Context | Chat request* |
|---|---|---|---|---|
| GPT-5.5 | $5.00 | $30.00 | 1.1M | $0.035 |
| GPT-5.6 Solcompare | $5.00 | $30.00 | 1.1M | $0.035 |
| Claude Opus 5 | $5.00 | $25.00 | 1M | $0.031 |
| Gemini 3.1 Pro | $2.00 | $12.00 | 1M | $0.014 |
*4,000 in + 800 out tokens, 50% cached input where available.
Related calculations
FAQ
GPT-5.5 costs $5.00 per 1M input tokens and $30.00 per 1M output tokens, with cached input at $0.50 per 1M tokens. Verified Aug 16, 2026 against https://developers.openai.com/api/docs/pricing.
GPT-5.5 supports a 1,050,000-token context window with up to 128,000 output tokens per request, tokenized with o200k_base.
At $5.00/M input and $30.00/M output, GPT-5.5 sits below GPT-5.6 Sol ($5.00/M in, $30.00/M out) — see the comparison table for full-workload differences.