GPT-5.6 Sol (OpenAI) API

OpenAI · serves gpt-5.6-sol

Pricing

Input / 1M	$1.00
Output / 1M	$5.00
Blended / 1M	$6cheapest of 3
Cached input / 1M	$0.10
Context window	400,000 tokens
Max output	128,000 tokens
License	API only · Proprietary proprietary
Knowledge cutoff	February 2026 · source
Intelligence index	58.9 Artificial Analysis Intelligence Index · source

textvisionfunction-calling

Price verified 2026-09-05 (0 days ago) · sourcesources disagree

Sources

Sources disagree by 300% on this price. The figure above is the primary source; cross-check before relying on it.

Source	Input / 1M	Output / 1M	Verified
OpenRouter	$1.00	$5.00	2026-09-05
LiteLLM	$4.00	$20.00	2026-09-03
models.dev	$4.00	$20.00	2026-09-04

Independent sources disagree — treat with caution.

Call it

Served via OpenRouter, pinned to OpenAI — the provider these prices are resolved from. Set OPENROUTER_API_KEY. Provider page.

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.6-sol",
    "messages": [{"role": "user", "content": "Hello"}],
    "provider": {"only": ["OpenAI"], "allow_fallbacks": false}
  }'

from openai import OpenAI  # pip install openai

client = OpenAI(
    base_url="https://openrouter.ai/api/v1",
    api_key="...",  # OPENROUTER_API_KEY
)
resp = client.chat.completions.create(
    model="openai/gpt-5.6-sol",
    messages=[{"role": "user", "content": "Hello"}],
    extra_body={"provider": {"only": ["OpenAI"], "allow_fallbacks": false}},
)
print(resp.choices[0].message.content)

Price unchanged since 2026-09-03 — 1 point on record.

Use this data

Raw JSON for this page: gpt-5.6-sol.json. Free to reuse under CC BY 4.0 with attribution to apipriceindex.com.