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GPT-5.6 Sol

Frontier GPT-5.6 model for complex professional work with the highest reasoning capabilities.

gpt-5.6-sol
STABLEGet StartedView uptime
1,050,000 context
Released July 9, 2026
Starting at $4.50/M (10% off) input tokens (tiered)
Starting at $27.00/M (10% off) output tokens (tiered)
Streaming
Vision
Tools
Reasoning
JSON Output
Structured JSON
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10% offthis model via OpenAI

Select Provider

All Providers for GPT-5.6 Sol

OffRail routes requests to the best providers that are able to handle your prompt size and parameters.

OpenAI
Context: 1.1M10% off
Input
$5$4.5
10% off
/M tokens
Cache Read
$0.5$0.45
10% off
/M tokens
Output
$30$27
10% off
/M tokens
Cache Write 5m
$6.25$5.625
10% off
/M tokens
Cache Write 1h
$6.25$5.625
10% off
/M tokens
Tiered Pricing
IN
CACHED
OUT
≤272K tokens
$5$4.5
10% off
$0.5$0.45
10% off
$30$27
10% off
>272K tokens
$10$9
10% off
$1$0.9
10% off
$45$40.5
10% off
+ $0.010$0.009 per search
Get Started
Azure
Context: 1.1M
Input
$5
/M tokens
Cache Read
$0.5
/M tokens
Output
$30
/M tokens
Cache Write 5m
$6.25
/M tokens
Cache Write 1h
$6.25
/M tokens
Tiered Pricing
IN
CACHED
OUT
≤272K tokens
$5
$0.5
$30
>272K tokens
$10
$1
$45
+ $0.010 per search
Get Started
AWS Mantle
Context: 278.5k
Input
$5.5
/M tokens
Cache Read
$0.55
/M tokens
Output
$33
/M tokens
Cache Write 5m
$6.875
/M tokens
Cache Write 1h
$6.875
/M tokens
Get Started

Frequently asked questions

What is GPT-5.6 Sol?

Frontier GPT-5.6 model for complex professional work with the highest reasoning capabilities. You can access it through OffRail's OpenAI-compatible API with automatic provider routing, fallback, and cost analytics.

How much does GPT-5.6 Sol cost?

Pricing for GPT-5.6 Sol on OffRail starts at $5.00 per million input tokens and $30.00 per million output tokens, depending on the provider. The pricing table above always reflects the current per-provider rates.

What is the context length of GPT-5.6 Sol?

GPT-5.6 Sol supports a context window of up to 1,050,000 tokens on its largest provider deployment.

Which providers serve GPT-5.6 Sol?

GPT-5.6 Sol is served by OpenAI, Azure, AWS Mantle through OffRail. Requests are automatically routed to the best available provider, with fallback when a provider has issues.

Does GPT-5.6 Sol support tool calling and structured outputs?

Yes. GPT-5.6 Sol supports both tool (function) calling and strict JSON output schema (upstream-enforced) through OffRail.

When was GPT-5.6 Sol released?

GPT-5.6 Sol was released on July 9, 2026.

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