GPT-5.5 Pro pricing
GPT-5.5 Pro costs $30.00 per 1M input tokens and $180.00 per 1M output tokens as of September 2026. Tracked daily since 14 June 2026 across 89 snapshots.
Current rates
- Input: $30.00 per 1M tokens
- Output: $180.00 per 1M tokens
- Cached input: $30.00 per 1M tokens
- Context window: 1,000,000 tokens
No price movement recorded for GPT-5.5 Pro over the tracked period — the rate has held steady.
Cheaper alternatives to GPT-5.5 Pro
Ranked by blended cost assuming a 3:1 input-to-output ratio, which is typical of chat and agent workloads. Only currently callable models with a comparable context window are listed.
| Model | Input / 1M | Output / 1M | Cheaper by |
|---|---|---|---|
| Claude Fable 5.1 | $10.00 | $50.00 | 70% |
| GPT-6 Astra | $10.00 | $50.00 | 70% |
| Gemini 3.1 Pro | $2.00 | $12.00 | 93% |
| Grok 4.6 | $2.00 | $6.00 | 96% |
| Muse Spark 1.3 | $1.25 | $4.25 | 97% |