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LLM · sync

budget-chat

One endpoint, every free model: GLM, Nemotron, MiniMax, Gemma, Ling, Laguna.

0.0(0 reviews)2 invocations1credits / call
#openrouter#llm#chat-completion#free#byok#multi-model#glm#nemotron#gemma
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Model picker

mock screenshot

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About

budget-chat is the catch-all for the free tier. Instead of one listing per vendor, it exposes a single endpoint over every zero-cost model orqis has vetted, so you switch models by changing one string.

**Managed-mode allowlist** (all free on OpenRouter): • `z-ai/glm-5.2:free` — GLM 5.2, 256K context • `nvidia/nemotron-3-super-120b-a12b:free` (default) — Nemotron 3 Super 120B • `nvidia/nemotron-3.5-lightning:free` — Nemotron 3.5 Lightning, 1M context • `minimax/minimax-m2.7:free` — MiniMax M2.7 • `google/gemma-4-31b-it:free` — Gemma 4 31B • `inclusionai/ling-3.0-flash-fin:free` — Ling 3.0 Flash • `poolside/laguna-s-2.1:free` — Laguna S 2.1 • `cohere/north-mini-code:free` — North Mini Code

`GET /v1/agents/budget-chat` returns the live allowlist, so you don't have to hard-code this.

**Modes:** • **Managed** — `OPENROUTER_API_KEY` set on the host; 1 credit per call; allowlisted models only (anything else gets a 400 naming the allowlist). • **BYO key** — pass your own OpenRouter `apiKey`; 1-credit routing fee; any model id accepted, paid models included. • **Mock** — canned echo, refunded to 0 credits.

Response includes `usage.costUsd`, which reads $0 on free models. Managed mode caps `maxTokens` at 2048 — free models share a per-account rate limit. Non-streaming.

Models & weights

7 of 8 models this agent routes to publish their weights. Pass a model slug to pick one, or omit it for the default.

  • MiniMax M2.7Default
    minimax/minimax-m2.7:free
    192K ctxWeights
  • Laguna S 2.1
    poolside/laguna-s-2.1:free
    256K ctxWeights
  • GLM 5.2
    z-ai/glm-5.2:free
    256K ctxWeights
  • Gemma 4 31B
    google/gemma-4-31b-it:free
    256K ctxWeights
  • Ling 3.0 Flash
    inclusionai/ling-3.0-flash-fin:free
    256K ctxAPI-only
  • North Mini Code
    cohere/north-mini-code:free
    256K ctxWeights
  • Nemotron 3.5 Lightning
    nvidia/nemotron-3.5-lightning:free
    1M ctxWeights
  • Nemotron 3 Super 120B
    nvidia/nemotron-3-super-120b-a12b:free
    256K ctxWeights

Weights links come from OpenRouter's model metadata, not from a hand-maintained list, so they track the live roster.

{
  "type": "object",
  "required": [
    "messages"
  ],
  "properties": {
    "messages": {
      "type": "array",
      "minItems": 1,
      "maxItems": 64,
      "items": {
        "type": "object",
        "required": [
          "role",
          "content"
        ],
        "properties": {
          "role": {
            "type": "string",
            "enum": [
              "user",
              "assistant",
              "system"
            ]
          },
          "content": {
            "type": "string",
            "maxLength": 100000
          }
        }
      }
    },
    "model": {
      "type": "string",
      "default": "nvidia/nemotron-3-super-120b-a12b:free",
      "description": "OpenRouter slug (vendor/model). Managed mode: must be on the budget allowlist. BYO mode: any."
    },
    "maxTokens": {
      "type": "integer",
      "minimum": 1,
      "maximum": 8192,
      "default": 1024
    },
    "temperature": {
      "type": "number",
      "minimum": 0,
      "maximum": 2,
      "default": 1
    },
    "apiKey": {
      "type": "string",
      "description": "BYO OpenRouter key. When set, routing fee is 1 credit and the allowlist is lifted."
    }
  }
}

These are descriptive previews. Schema-validated invocation lands in Sprint 6 with an interactive "Try it" panel.

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