OpenAI: GPT-5.6 Sol
OpenAI: GPT-5.6 Sol
openai/gpt-5.6-sol
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GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks and long-horizon problem solving.
Modalities
In / Out Price
50% off
$2.50 / $15per 1M
Context
1M
Released
Jul 9, 2026
Knowledge Cutoff
Feb 2026
Providers
Providers
Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick — Balanced (price + speed), Nitro (fastest), or Exacto (highest tool-calling accuracy).
Pricing
The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.
Performance
Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).
Uptime
Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.
Benchmarks
Scores on standardized evaluations. Higher percentages are better — and rank percentile shows where this model lands among all models on OpenRouter.
Apps
Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.
Activity
Token volume and request traffic to this model over time.
Quick Start
Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.
About OpenAI: GPT-5.6 Sol
OpenRouter makes OpenAI: GPT-5.6 Sol available through a unified, OpenAI-compatible API using the model ID openai/gpt-5.6-sol. Requests can be routed across 3 providers, including OpenAI, Azure (EU) and Amazon Bedrock (US), with automatic failover when an endpoint is unavailable.
OpenAI: GPT-5.6 Sol accepts files such as PDFs, images and text and returns text. It has a 1,050,000-token context window and a maximum output of 128,000 tokens.
On OpenRouter, OpenAI: GPT-5.6 Sol costs $2.50/M input tokens and $15.00/M output tokens, with separate rates for Cache Read at $0.25/M tokens, Cache Write at $3.125/M tokens and Web Search at $10.00/1K calls. Effective pricing can be lower when prompt caching applies. It was released on July 9, 2026; its knowledge cutoff is February 16, 2026.
More models from OpenAI
Frequently asked questions
What is GPT-5.6 Sol?
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks and long-horizon problem solving.
How much does GPT-5.6 Sol cost?
GPT-5.6 Sol costs $2.50/M input tokens and $15.00/M output tokens, with separate rates for Cache Read at $0.25/M tokens, Cache Write at $3.125/M tokens and Web Search at $10.00/1K calls.
What is the context length of GPT-5.6 Sol?
GPT-5.6 Sol has a 1,050,000 token context window. It supports up to 128,000 completion tokens.
Does GPT-5.6 Sol support tool calling and structured outputs?
Yes. GPT-5.6 Sol accepts `tools` and `tool_choice` for function calling. It also supports structured outputs via a JSON schema in `response_format`.
What inputs and outputs does GPT-5.6 Sol support?
GPT-5.6 Sol accepts files such as PDFs, images and text as input and returns text.
Which providers serve GPT-5.6 Sol?
GPT-5.6 Sol is served by 3 providers on OpenRouter: OpenAI, Azure (EU) and Amazon Bedrock (US). Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.
When was GPT-5.6 Sol released?
GPT-5.6 Sol was released on July 9, 2026. Its knowledge cutoff is February 16, 2026.
Standard
Latency / throughputP50
| OpenAI50% off | $5.00$2.50 | $30.00$15.00 | $0.50$0.25 | 3.02s | 44 tps | 99.80% |
| ------------------------------------------------------------------------------------------------ | ---------- | ------------ | ---------- | ----- | ------ | ------ |
| 
Azure | $5.00 | $30.00 | $0.50 | 5.07s | 39 tps | 99.86% |
| Azure (EU) | $5.50 | $33.00 | $0.55 | 0.35s | 37 tps | \-- |
| 
Amazon Bedrock (US) | $5.50 | $33.00 | $0.55 | 2.28s | 88 tps | \-- |
| Azure (US) | $5.50 | $33.00 | $0.55 | 4.35s | 29 tps | 93.35% |
Throughput
88tok/s
P50, best across providers
Latency
0.34s
P50, best provider
All locations
Latency / throughputP501 week
AutoExacto Benchmarks
GPQA DiamondTAU-Bench
Azure (EU)
90.6%80.0%
auto-routing
91.4%77.3%
Azure (US)
92.1%74.0%
OpenAI
91.4%74.0%
Amazon Bedrock (US)
92.3%70.4%
Azure
\--77.3%
Uptime (3d)
100.00%
Availability (3d)
99.02%
Availability over the last 3 days
Last 72 hours
Availability 99.02%
3 Days Ago2 Days AgoYesterdayNow
Availability over the last 24 hours
OpenRouter Availability
98.10%
Without Routing
95.92%
When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and customization options.
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