{"id":"ampersand-humans-and","slug":"ampersand-humans-and","name":"Ampersand","orgId":"humans-and","family":"ampersand-humans-and","releaseDate":null,"availability":"announced","openWeights":false,"license":null,"paramsTotal":null,"paramsSource":null,"contextWindow":null,"knowledgeCutoff":null,"modelCardUrl":"https://x.com/humansand/status/2112674550907552137","hfRepo":null,"modalities":["text"],"aliases":["Ampersand","ampersand v0.1","ampersand-v0.1","humans& ampersand","humansand ampersand","ampersand (humans&)"],"aliasNote":null,"origin":"tracked","tracked":{"trackedSince":"2026-10-20","announced":"2026-10-20","blurb":"humans&'s collaborator model, trained to help people and groups reach their individual and collective goals over long, open-ended interactions. Post-trained from GLM 5.3 with reinforcement learning against simulated users from the lab's Persimmon user model. Available to everyone through the lab's Agents API; no open weights.","api":"live","apiModelId":"ampersand-v0.1","openWeights":"no","params":{"text":"About 744B total, about 40B active (GLM 5.3 mixture-of-experts)","source":"humans& Ampersand v0.1 model card"},"facts":[{"label":"Version","value":"v0.1 (API id ampersand-v0.1)"},{"label":"Base model","value":"GLM 5.3: mixture-of-experts, 78 layers, 256 routed experts plus 1 shared, 8 active per token"},{"label":"Context","value":"1,048,576 tokens (GLM 5.3)"},{"label":"Modalities","value":"Text in, text out; can post a message, request a tool, or wait without posting"},{"label":"Training","value":"Reinforcement learning in long-horizon, multi-party social simulations, with users played by Persimmon (humans&'s user model)"},{"label":"Access","value":"Agents API (OpenAI client compatible), open to all developers"},{"label":"Price (humans&)","value":"$1.00 per 1M input tokens, $0.20 cached input, $5.20 output"}],"claims":["Lab claim: in multi-month simulations, users collaborating with Ampersand accomplished more than with Fable and other frontier models.","Lab claim (tentative, per the model card): 59.1% on Collaborative Intelligence (teamwork) vs 54.3% for GLM 5.3, and 39.0% cooperative success on CooperBench vs 17.3% for GLM 5.3."],"sources":[{"kind":"lab","title":"humans& announcement on X","url":"https://x.com/humansand/status/2112674550907552137","date":"2026-10-20"},{"kind":"lab","title":"Introducing Ampersand (humans& blog)","url":"https://ampersand.humansand.ai/blog/","date":"2026-10-20"},{"kind":"lab","title":"Ampersand v0.1 model card","url":"https://ampersand.humansand.ai/blog/model-card.html","date":"2026-10-20"},{"kind":"lab","title":"Ampersand API pricing","url":"https://ampersand.humansand.ai/docs/PRICING.html","date":"2026-10-20"}],"firstBenchmark":null},"organization":{"id":"humans-and","name":"humans&","slug":"humans-and","country":null,"url":"https://humansand.ai","color":"#11110F","mark":"H"},"price":null,"answer":{"word":"Pending benchmarks.","scope":"Announced Oct 20, 2026; no independent results yet.","lead":"As of Oct 22, 2026, Ampersand is pending benchmarks on isitsota: announced Oct 20, 2026, with no independent results on the boards we track yet.","confidence":"low"},"status":"PENDING_BENCHMARKS","verdicts":[]}