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Favicon for liquid

LiquidAI: D1

liquid/d1

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D1 is Liquid AI's structured decision model, served as a System One endpoint. Send a state along with typed questions, and it returns a choice, a score, or a yes/no answer, each with a probability taken directly from the model rather than written out as text. It uses the same /v1/systemone schema as other OpenRouter Decisions models, so it suits routing, classification, and policy checks that need a fast, scored answer instead of prose.

Modalities
In / Out Price
$0.04 / $0per 1M
Context
66K
Released
Oct 1, 2026
Compare
PlaygroundProvidersPricingPerformanceUptimeAppsActivityFAQ

Playground

Providers

This model is hosted by one provider. OpenRouter forwards every request to it directly — no routing decisions to make.

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.

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.

API

Drop-in code to call this model. It runs on the OpenRouter Decisions API rather than the OpenAI-compatible chat endpoint, so the request and response shapes below are specific to structured decisions — chat completions SDKs will not work with it.

$0.04Free$0.040.32s
100.00%
Latency
0.32s

P50, best provider

Uptime (3d)The model was reachable. Request routed to a provider.
96.49%
Availability (3d)The model returned inference from any provider. Errors and empty responses count against it.
96.41%

Availability over the last 3 days

Last 72 hours
Availability 96.41%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
99.77%

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.

1.
Favicon for https://decisionapi.net/
DecisionsApi
new
334tokens

Frequently asked questions

D1 is Liquid AI's structured decision model, served as a System One endpoint. Send a state along with typed questions, and it returns a choice, a score, or a yes/no answer, each with a probability taken directly from the model rather than written out as text.

D1 costs $0.04/M input tokens and $0.00/M output tokens, with separate rates for Cache Read at $0.04/M tokens.

D1 has a 65,536 token context window.

D1 accepts text as input and returns structured decisions.

LFM2.5-2.6B (free) is another text model from Liquid.

D1 was released on October 1, 2026.

More models from Liquid

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LFM2.5-1.2B-Thinking

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LFM2-8B-A1B is an efficient on-device Mixture-of-Experts (MoE) model from Liquid AI’s LFM2 family, built for fast, high-quality inference on edge hardware. It uses 8.3B total parameters with only ~1.5B active per token, delivering strong performance while keeping compute and memory usage low—making it ideal for phones, tablets, and laptops.

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LFM 7B

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See the launch announcement for benchmarks and more info.

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