Substrate review

The listed entry rates are $0.10 to $0.20 for input and $0.50 to $0.75 for output, and those are the figures to plan a budget around. Input ranks 43 of 71 on this site, so a token-heavy product will not be the cheapest option here, and the top of each range is what heavier models will cost.

The catalogue covers GPT 6 Luna, GLM 5.3 Flash and GPT 6 Sol, bringing several model families together in one place. The largest context window listed is 1,100,000, which ranks 4 of 72 among the brands compared, so long documents and large codebases are the case it is built for.

There is a free trial, and the Basic plan carries a monthly allowance of AI credits. That is enough to measure a real workload before signing anything. Free tiers are common in this category, where 81% of the compared brands offer one, so the trial is not unusual but is still the cheapest way in.

The contracting entity is Zo Computer Company, headquartered in the United States and founded in 2025. That makes it a young operation rather than an established hyperscaler, so enterprise buyers should read the terms and liability position before committing spend to it.

Support runs on email, help centre and community, so there is a help centre and a community alongside email. No live chat or phone line is listed, which means time-sensitive problems wait on email. Help centres are the most common route across the brands here, at 90.2%.

The only region detail stated is a US base, US, and the plan on file is free tier. No edge locations or data residency choices are listed, so confirm where inference runs before shipping regulated workloads or anything under contract that names a processing region.

Salad lists input fees of $0.06, below the $0.10 to $0.20 shown for Substrate, so a buyer optimising purely on token cost has a cheaper entry point there. Substrate answers a different question, offering a 1,100,000 context window and a multi-lab catalogue.

Azure AI Foundry and Supascale AI suit buyers who want a long model list instead of a large window. Substrate goes the other way, with a 1,100,000 context window and a free trial plus monthly AI credits on the Basic plan, so a team can measure a real workload before it commits to a contract.