---
title: "GPT-5.6 Sol — API access"
description: "GPT-5.6 Sol API pricing: temporary official $4/$20 per 1M tokens through 2026-11-21, $2/$10 with the flat 50% apiToken.sale discount; standard $5/$30 returns 2026-11-22 UTC."
url: "https://apitoken.sale/models/gpt-5-6-sol"
language: "en"
---
# GPT-5.6 Sol

GPT-5.6 Sol is the flagship of the GPT-5.6 line for reasoning and agentic coding on the OpenAI-compatible endpoint. GPT-6 Astra is the latest GPT model. Here is what it costs per token, and how to run it cheaper on the same key and balance.

- **Model ID:** `gpt-5.6-sol`
- **Tier:** Flagship
- **Context window:** 1.05M tokens
- **Max output:** 128K tokens
- **Official price (per 1M):** $4 input / $20 output
- **Your price (per 1M):** input $2, output $10 (flat 50% off)
- **Base URL:** `https://router.apitoken.sale/v1` · **Endpoints:** `POST /v1/responses`, `POST /v1/chat/completions` (Authorization: Bearer)

## Best for

- Agentic coding in Codex CLI, opencode and OpenAI-compatible tools.
- Hard reasoning with adjustable effort, up to the max level.
- Long multi-turn sessions with cached-input pricing.

## Notes

- gpt-5.6 is a convenience alias of gpt-5.6-sol — the same model at the same price.
- Text and image input, text output. SSE streaming on both Responses and Chat Completions.
- Requests above 272K input tokens bill at OpenAI long-context rates: 2× input and 1.5× output on the whole request.

## Call it

```bash
curl https://router.apitoken.sale/v1/responses \
  -H "Authorization: Bearer $APITOKEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "gpt-5.6-sol", "input": "Reply with exactly: connected"}'
```

## FAQ

**How much does the GPT-5.6 Sol API cost?**

Through 2026-11-21 inclusive, the temporary official card is $4 input, $0.40 cached input, $5 cache write and $20 output per 1M tokens. Here that is $2/$0.20/$2.50/$10 after 50% off. Standard $5 input and $30 output return on 2026-11-22 UTC.

**What is the model ID for GPT-5.6 Sol?**

gpt-5.6-sol (gpt-5.6 is an alias of the same model). Use it with the OpenAI SDK, Codex CLI, opencode or any OpenAI-compatible tool pointed at https://router.apitoken.sale/v1.

**Does the same key really work for GPT and Claude?**

Yes. One sk-pool key and one prepaid balance cover both surfaces: Anthropic Messages API for Claude models and the OpenAI-compatible API for GPT models. The same discount applies to both.

---
API reference: https://apitoken.sale/md/docs · All models: https://apitoken.sale/md/models