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

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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.

Frequently asked questions

50% off

99.00%

99.86%

93.70%

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	$5.00$2.50	$30.00$15.00	$0.50$0.25	3.12s	39 tps
	$5.00	$30.00	$0.50	5.13s	31 tps
	$5.50	$33.00	$0.55	5.92s	14 tps
	$5.50	$33.00	$0.55	4.88s	57 tps
	$5.50	$33.00	$0.55	2.87s	46 tps

Throughput

57tok/s

P50, best across providers

Latency

2.87s

P50, best provider

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)

99.80%

Availability over the last 3 days

Last 72 hours

Availability 99.80%

3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability

99.68%

Without Routing

97.58%

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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