Tiers
From the Meridians Wiki · Public · Maintained · joint
Low → high. frontier is the most capable/expensive rung; balanced is the fast-and-capable middle
(formerly the "quick" tier).
| Tier | OpenRouter model | Context | $ in / out per 1M | Role |
|---|---|---|---|---|
| Budget | deepseek/deepseek-v4-flash-0731 | 1,048,576 | $0.09 / $0.18 | Cheapest. High-volume, cost-dominated work. |
| Balanced | google/gemini-2.5-flash | 1,048,576 | $0.30 / $2.50 | Fast + capable everyday middle; interactive/structured work. |
| Performance | google/gemini-3.7-flash | 1,048,576 | $0.375 / $1.875 | Deepest non-frontier reasoning; builds the durable substrate. |
| Frontier | moonshotai/kimi-k3 | 1,048,576 | $3 / $15 | Kimi K3 — 2.8T-param reasoning model. Where quality compounds. |
Retuning a whole rung (swap the model) is a one-line change in
TIER_MODEL; every category on that tier follows.google/gemini-2.5-flash-liteis the cross-modelFALLBACK_MODEL(last-resort safety net after provider failover), not a tier; its context window is also 1,048,576 tokens. The executable limits live inMODEL_CONTEXT_WINDOWS, sourced from OpenRouter's routed-provider catalog values. Generation preflight reserves output and reasoning room before admitting a call.