Unfortunately OpenCode Go is garbage now. Charm Hyper provides deepseek-4.1-flash at $0.33/$1.31/$0.03/M/cache, and glm-5.3-flash at $0.16/$0.54/$0.03. The rate limit is the same for all models, just the cost; not like the absurd multiple-levels-of-price-rate-limit OpenCode Go pricing, nor their terrible performance.