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fix(estimate): chat is free by MCP's FREE_CHAT_MODELS, not by an nvidia/ prefix #3

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Merged
VickyXAI merged 2 commits into from
Oct 20, 2026
Merged

fix(estimate): chat is free by MCP's FREE_CHAT_MODELS, not by an nvidia/ prefix #3

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b9c5319
fix(estimate): chat is free by MCP's FREE_CHAT_MODELS, not by an nvid…
1bcMax Oct 20, 2026
714a0bd
fix(estimate): drop nvidia/deepseek-v4-pro and -flash from the free list
1bcMax Oct 20, 2026
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38 changes: 37 additions & 1 deletion lib/estimate.js
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Original file line number Diff line number Diff line change
Expand Up @@ -90,6 +90,40 @@ const SPEECH_RATE = {
const SPEECH_DEFAULT_RATE = 0.05; // elevenlabs/flash-v2.5 (the MCP default)
const SOUND_EFFECT_COST = 0.0525;

// Chat models billed $0 — mirrors @blockrun/mcp FREE_CHAT_MODELS
// (src/utils/constants.ts), refreshed 2026-10-20. Membership by id, not
// vendor: cohere/ and poolside/ have $0 models, and not every nvidia/ id is
// guaranteed free. Sources: GET /v1/models billing_mode "free" and the account
// price sheet (blockrun.ai/api/pricing) at $0.
const FREE_CHAT_MODELS = new Set([
"nvidia/gpt-oss-20b", "nvidia/nemotron-3-super-120b", "nvidia/llama-3.2-11b-vision",
"nvidia/nemotron-3-nano-omni-30b-a3b-reasoning", "cohere/north-mini-code", "poolside/laguna-xs-2.1",
"nvidia/gpt-oss-120b", "nvidia/nemotron-3-ultra-550b", "nvidia/step-3.7-flash", "nvidia/mistral-nemotron",
"nvidia/nemotron-nano-12b-v2-vl", "nvidia/nemotron-nano-9b-v2", "nvidia/nemotron-3.5-lightning",
"nvidia/muse-glimmer-30b", "nvidia/gemma-4-31b", "nvidia/nemotron-3-super-120b-a12b-free",
"nvidia/qwen3.5-397b-a17b", "nvidia/nemotron-ultra-253b", "nvidia/nemotron-super-49b", "nvidia/deepseek-v3.2",
"nvidia/nemotron-3-nano-omni-nim",
"nvidia/mistral-large-3-675b", "nvidia/qwen3-coder-480b", "nvidia/devstral-2-123b", "nvidia/glm-4.7",
"nvidia/llama-4-maverick", "nvidia/qwen3-next-80b-a3b-instruct", "nvidia/qwen3.5-122b-a10b",
"nvidia/seed-oss-36b", "nvidia/mistral-small-4-119b",
]);
// nvidia/deepseek-v4-pro and nvidia/deepseek-v4-flash are NOT here: the
// gateways retired both (unknown-model 400; blockrun#848 and its follow-up).
//
// Bare spellings the gateway also accepts. A free id whose bare name belongs
// to a PAID model must be listed here and excluded, so the paid model wins
// the spelling (MCP FREE_SHADOWED_BY_PAID). Empty since the nvidia DeepSeek
// mirror was retired; bare "deepseek-v4-pro" is the paid
// deepseek/deepseek-v4-pro ($1.32/$3.96) and is not in the free set at all.
const FREE_SHADOWED_BY_PAID = new Set([]);
const FREE_CHAT_BARE = new Set(
[...FREE_CHAT_MODELS].filter((id) => !FREE_SHADOWED_BY_PAID.has(id)).map((id) => id.slice(id.indexOf("/") + 1)),
);
function isFreeChatModel(model) {
const id = String(model || "").trim();
return FREE_CHAT_MODELS.has(id) || (!id.includes("/") && FREE_CHAT_BARE.has(id));
}

// Whether `size` is in `model`'s large tier (see IMAGE_LARGE_THRESHOLD /
// IMAGE_LARGE_MIN_DIM). Unparseable sizes price at the base.
function isLargerThanBase(model, size) {
Expand Down Expand Up @@ -147,7 +181,9 @@ function estimate(toolName, input = {}) {
return { usd: paid ? 0.001 : 0, label: `price · ${cat || "crypto"}${paid ? "" : " (free)"}` };
}
case "chat": {
const free = input.mode === "free" || /^nvidia\//.test(input.model || "");
// An explicit model wins over mode, as in the MCP: mode is ignored when
// model is set.
const free = input.model ? isFreeChatModel(input.model) : input.mode === "free";
return { usd: free ? 0 : 0.005, label: `chat${free ? " (free tier)" : ""}` };
}
// Wallet + models are always free; data tools (if a fuller profile is used)
Expand Down