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gpt-5.6-sol API

gpt-5.6-sol

GPT-5.6 Sol is OpenAI's GPT-5.6 catalog model. OpenAI documents a roughly 1.05M-token context, text output, image input, and Chat Completions and Responses access; Flatkey exposes the gpt-5.6-sol route and its current catalog rates below.

Chat and codingLong contextTool workflows
Input /M
Reference price: $5
$4-20%
Cache /M
Reference price: $0.5
$0.4-20%
Output /M
Reference price: $30
$24-20%
Provider
OpenAI

Performance

GPT-5.6 Sol API performance and availability

Live Flatkey request telemetry appears here when enough traffic is available; no benchmark score is inferred.

Avg. provider uptime
91.9%
last 30 days
Latency
2.18s
last 30 days
Requests
145K
30-day window
Successful inference trend
#6 · 1.46T

Activity

GPT-5.6 Sol API usage and request activity

This chart uses live Flatkey request data for the selected model and stays unreported until enough traffic is collected.

Requests
145K
30-day window
Latency
2.18s
last 30 days
Uptime
91.9%
last 30 days
Successful inference trendActivity

Pricing

GPT-5.6 Sol API pricing by token

Prices below are calculated from Flatkey pricing data for this model and the visible groups currently returned by our pricing API.

Flatkey price

Input /M

Live catalog model
$4
Input /M
$4$5
Cache /M
$0.4$0.5
Output /M
$24$30
View API
Shared balance

Add credits

Add credits

Use the same Flatkey balance and API key across image, video, audio, and text models.

$10Open wallet$20Open wallet$50Open wallet
Model catalog
Model Type
Text
API
/v1/chat/completions
Billing basis
1M tokens
Context
1,048,576 tokens

GPT-5.6 Sol capabilities for documents, code, and agents

These cards describe practical workflows; exact context, modality, and route fields remain in the API section below.

Long-context document and code work

Use the model to plan, summarize, transform, and reason across large documents, codebases, and research notes.

Text and image understanding

Ground answers in written material and supported image input when a workflow needs more than text alone.

Structured agent workflows

Connect reasoning, structured output, tools, and streaming to assistants and application backends.

Production integration

Keep one stable model identity and account surface as experiments become repeatable product workflows.

Compare

GPT-5.6 Sol vs GPT-5.5, GPT-5.6 Terra, and GPT-5.6 Luna

This table compares documented integration fields only; no performance ranking is asserted.

CapabilityGPT-5.5 / GPT-5.6 Terra / GPT-5.6 LunaGPT-5.6 Sol
Catalog model IDUnknown in this verified fact setgpt-5.6-sol
EndpointUnknown/v1/chat/completions; /v1/responses
ContextUnknownAbout 1.05M tokens; 128K max output
ModalitiesUnknownText input/output; image input
Relative quality/benchmarkNot assertedNot asserted

Why use Flatkey for GPT-5.6 Sol?

A practical GPT-5.6 Sol API workflow

Keep the model ID, endpoint, context, and token dimensions visible while you move from a test request to production traffic.

Exact model routing

Set gpt-5.6-sol explicitly and keep the /v1/chat/completions path in your client configuration.

Token-dimension visibility

Review input, output, cache-read, and cache-creation rates instead of treating one headline price as universal.

Long-context workflows

Use the documented long context for document, code, and agent workflow planning, then verify your account limits.

One account for model testing

Keep API keys, limits, usage, and adjacent model experiments in the same Flatkey workspace.

API

Call the GPT-5.6 Sol API from your existing client

Use the exact model ID with Flatkey's Chat Completions or Responses endpoint in an OpenAI-shaped client.

POST /v1/chat/completions
POST /v1/responses
gpt-5.6-sol
Text input/output and image input are documented by OpenAI; Flatkey route fields may vary.
Use OpenAI-compatible request fields; do not infer Codex, streaming, or ChatGPT availability.
curl https://router.flatkey.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-..." \
  -d '{
  "model": "gpt-5.6-sol",
  "messages": [
    {
      "role": "user",
      "content": "You are a senior backend engineer. In 3 sentences, explain why developers should use an LLM gateway instead of calling each official API directly."
    }
  ]
}'
Docs

FAQ

GPT-5.6 Sol API
questions and pricing

Answers about the GPT-5.6 Sol API model ID, endpoint, token pricing, context, inputs, and catalog release metadata.

What is GPT-5.6 Sol?
GPT-5.6 Sol is OpenAI's GPT-5.6 catalog model. OpenAI documents a roughly 1.05M-token context, text output, and image input; Flatkey routes the model through /v1/chat/completions or /v1/responses.
How do I use GPT-5.6 Sol?
Create a Flatkey API key, send a request to /v1/chat/completions or /v1/responses, and set model to gpt-5.6-sol.
What is the GPT-5.6 Sol API model ID?
The verified model ID is gpt-5.6-sol; documented Flatkey endpoints are /v1/chat/completions and /v1/responses.
How much does GPT-5.6 Sol cost?
Use the pricing section above for current Flatkey prices from our pricing API.
What context window and inputs does GPT-5.6 Sol support?
OpenAI documents about 1.05M context tokens, text input/output, and image input. File tools and account limits remain route-specific, so check the Flatkey request contract.
When was GPT-5.6 Sol released?
The catalog snapshot records 2026-06-20 as the release date; treat this as catalog metadata rather than a launch announcement.