GPT-5.6 Sol API Pricing
GPT-5.6 Sol (OpenAI) costs $5.00 per 1M input tokens and $30.00 per 1M output tokens on the standard tier, as of July 2026.
What that means in practice
| Workload (per request) | Tokens in / out | Cost per request | Per 1,000 requests |
|---|---|---|---|
| Chat message | 1,000 / 400 | $0.0170 | $17.00 |
| Document summary | 10,000 / 1,000 | $0.0800 | $80.00 |
| Agent / long-context task | 50,000 / 5,000 | $0.4000 | $400 |
Estimate your exact workload with the AI API cost calculator.
Ways to pay less for GPT-5.6 Sol
- Prompt caching — repeated input (system prompts, shared documents) is billed at roughly 10% of the input rate. For agents this often halves the bill.
- Batch processing — non-urgent work submitted in batch runs at ~50% off.
- Route easy tasks down-tier — for simple classification or extraction, Claude Sonnet 5 or Claude Opus 4.8 cost a fraction as much.
How GPT-5.6 Sol compares (July 2026)
| Model | Provider | Input $/1M | Output $/1M |
|---|---|---|---|
| Gemini 2.5 Flash-Lite | $0.10 | $0.40 | |
| GPT-5.4 Nano | OpenAI | $0.20 | $1.25 |
| Gemini 2.5 Flash | $0.30 | $2.50 | |
| Claude Haiku 4.5 | Anthropic | $1.00 | $5.00 |
| GPT-5.6 Luna | OpenAI | $1.00 | $6.00 |
| Gemini 3.5 Flash | $1.50 | $9.00 | |
| Gemini 3.1 Pro | $2.00 | $12.00 | |
| GPT-5.4 | OpenAI | $2.50 | $15.00 |
| GPT-5.6 Terra | OpenAI | $2.50 | $15.00 |
| Claude Sonnet 5 | Anthropic | $3.00 | $15.00 |
| Claude Opus 4.8 | Anthropic | $5.00 | $25.00 |
| GPT-5.5 | OpenAI | $5.00 | $30.00 |
| GPT-5.6 Sol | OpenAI | $5.00 | $30.00 |
| Claude Fable 5 | Anthropic | $10.00 | $50.00 |
Standard-tier, short-context list prices as of July 2026. Providers change pricing frequently — confirm on the official pricing page before committing. Long-context requests, priority tiers, and fine-tuned variants are priced differently.
Where GPT-5.6 Sol fits
GPT-5.6 Sol is a frontier-tier model — top-end reasoning for the hardest tasks (complex coding, long-horizon agents, research). Worth the premium when output quality matters more than cost; route routine traffic to a cheaper tier.
Other OpenAI models: GPT-5.4 Nano · GPT-5.6 Luna · GPT-5.4