GPT-5.6 Sol

Official

openai/gpt-5.6-sol

The flagship GPT-5.6 model for demanding reasoning, coding, and long-running agent workflows. It supports text and image input, a 1.05M-token context window, configurable reasoning through max effort and Pro mode, persisted reasoning, and explicit prompt caching.

1050K contextVisionReasoningTool callingCodingPrompt cachePaid cache writes

Pricing

Source: openai_x0.05 · Verified 2026-07-10

InputOfficial $5 / M tokens

$0.25/ M tokensSave 95%

OutputOfficial $30 / M tokens

$1.5/ M tokensSave 95%

Cache read $0.025/M · Cache write $0.3125/M

Tier	Input	Cache read	Cache write	Output
Standard ≤272K

Protocols

OpenAI Chat CompletionsStatus: Available: Streaminghttps://api.onehop.ai/v1
OpenAI ResponsesStatus: Available: Streaminghttps://api.onehop.ai/v1
Anthropic MessagesStatus: Available: Streaminghttps://api.onehop.ai/anthropic
Google Vertex AIStatus: Not supported—

Try it in the chat playground

Call IDs

Use either ID to call this model via the API.

OneHop nameopenai/gpt-5.6-sol

Usable Model IDs

You can use these names directly in the request model field.

gpt-5.6openai/gpt-5.6

Try it

Replace the ONEHOP_KEY placeholder with your API key. Create one →

from openai import OpenAI

client = OpenAI(
    base_url="https://api.onehop.ai/v1",
    api_key="<ONEHOP_KEY>",
)

completion = client.chat.completions.create(
    model="openai/gpt-5.6-sol",
    messages=[{"role": "user", "content": "What is the meaning of life?"}],
)
print(completion.choices[0].message.content)

base_url: https://api.onehop.ai/v1