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The free Inkling Small endpoint is only available for use with agentic harnesses. Do not upload any confidential information or personal data (e.g., voices and images of people's faces). Your usage of this free endpoint, including prompts and outputs, is logged and used to improve Thinking Machines Lab's models, products, and services. The logged session data will be disassociated from your account and other persistent identifiers before being used for these purposes.

By using this free endpoint, you agree to the TML Free Research API Terms of ServiceOpens in new tab. For more information about Thinking Machines Lab's data processing practices, see this Privacy NoticeOpens in new tab.

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Thinking Machines: Inkling Small (free)

thinkingmachines/inkling-small:free

Model weights
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Inkling Small is an open-weight multimodal mixture-of-experts model from Thinking Machines Lab, with 12B active parameters out of 276B total. It is positioned as the smaller, more efficient member of the Inkling family and is suited for reasoning, coding, agentic workflows, retrieval-augmented generation, instruction following, and multilingual conversation.

Modalities
Price
Free
Context
1.0M
Released
Jul 30, 2026
Compare
ProvidersPerformanceUptimeBenchmarksAppsActivityFAQExplore

Providers

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

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 and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for Thinking Machines: Inkling Small (free) (Artificial Analysis)
SourceBenchmarkScore
Artificial AnalysisInkling Small Intelligence Index25.7
Artificial AnalysisInkling Small Coding Index52.9
Artificial AnalysisInkling Small Agentic Index23.5
Artificial AnalysisInkling Small GPQA Diamond89.5%
Artificial AnalysisInkling Small HLE33.3%
Artificial AnalysisInkling Small AA-LCR75.7%
Artificial AnalysisInkling Small GDPval-AA30.4%
Artificial AnalysisInkling Small CritPt8.3%
Artificial AnalysisInkling Small SciCode49.7%
Artificial AnalysisInkling Small AA-Omniscience Accuracy33.2%
Artificial AnalysisInkling Small AA-Omniscience Non-Hallucination Rate37.0%

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. 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.

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FreeFree1.21s98 tps
95.50%
Throughput
98tok/s

P50, best across providers

Latency
1.21s

P50, best provider

AutoExacto benchmarks
GPQA DiamondTAU-BenchBaseTen87.5%--DeepInfra87.0%63.9%auto-routing86.6%58.7%Together51.0%28.1%
Uptime (3d)The model was reachable. Request routed to a provider.
100.00%
Availability (3d)The model returned inference from any provider. Errors and empty responses count against it.
96.73%

Availability over the last 3 days

Last 72 hours
Availability 96.73%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
98.14%

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.
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Frequently asked questions

Inkling Small is an open-weight multimodal mixture-of-experts model from Thinking Machines Lab, with 12B active parameters out of 276B total. It is positioned as the smaller, more efficient member of the Inkling family and is suited for reasoning, coding, agentic workflows, retrieval-augmented generation, instruction following, and multilingual conversation.

Yes. The pricing shown on this page for Inkling Small (free) is zero, so you are not charged for prompt or completion tokens. Free endpoints are rate limited — see the rate limit docs.

Inkling Small (free) has a 1,048,576 token context window. It supports up to 262,144 completion tokens.

Yes. Inkling Small (free) accepts tools for function calling. It does not support response_format, so JSON output is not enforced.

Inkling Small (free) accepts text, images, and audio as input and returns text.

Inkling is another text model from Thinking Machines.

Inkling Small (free) was released on July 30, 2026.

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