> For the complete documentation index, see [llms.txt](https://docs.fastrouter.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fastrouter.ai/explore-features/free-models-free.md). # Free Models (:free) ### Introduction This feature is available to all orgs regardless of billing status. Provided at FastRouter's discretion; free access on any given model can be paused or removed at any time. *** ### How It Works Append `:free` to any supported model ID: ``` sarvam/sarvam-105b:free ``` FastRouter strips the suffix, checks whether `:free` is enabled for that model, verifies your org's daily quota, then routes the request normally. The `:free` suffix is invisible to the downstream provider. If a model does not have `:free` enabled, the request is rejected. The standard model ID (without the suffix) is unaffected. > **Note:** The 10-request daily quota is org-wide and shared across all API keys and members. Paid orgs using `:free` consume from this free quota — not from billing credits. *** ### Supported Models Currently, supported on Sarvam models in our catalog for a limited time. | Model | Free Model ID | | ------------------- | ------------------------- | | Sarvam: Sarvam 105B | `sarvam/sarvam-105b:free` | | Sarvam: Sarvam 30B | `sarvam/sarvam-30b:free` | | Sarvam: Saaras V3 | `sarvam/saaras:v3:free` | | Sarvam: Bulbul V2 | `sarvam/bulbul:v2:free` | `:free` is enabled on a per-model basis. Check the [model catalog](https://claude.ai/models) — eligible models display a **Free** badge on their detail page. *** ### Usage #### cURL ```bash curl 'https://api.fastrouter.ai/api/v1/chat/completions' \ --header 'Authorization: Bearer YOUR_API_KEY' \ --header 'Content-Type: application/json' \ --data '{ "model": "sarvam/sarvam-105b:free", "messages": [ { "role": "user", "content": "Explain backpressure in streaming systems." } ] }' ``` #### Python (OpenAI SDK) ```python from openai import OpenAI client = OpenAI( base_url="https://api.fastrouter.ai/api/v1", api_key="YOUR_API_KEY", ) response = client.chat.completions.create( model="sarvam/sarvam-105b:free", messages=[ {"role": "user", "content": "Explain backpressure in streaming systems."} ], ) print(response.choices[0].message.content) ``` *** ### Quota & Limits | Property | Value | | ------------------------ | ------------------------------------------------------ | | Requests per org per day | 10 | | Scope | Per model — quota tracked independently per `model_id` | | Reset | Daily at UTC midnight | | Carry-over | None — unused requests do not roll over | | Paid org behaviour | Consumes free quota, not billing credits | *** ### Error Responses #### `:free` not enabled on this model — `400` Returned when `:free` is used on a model that does not have the slug enabled. ```json { "error": { "code": "free_slug_not_enabled", "message": "The :free slug is not available for this model. Use the standard model ID or check the model catalog for supported free models.", "type": "invalid_request_error" } } ``` #### Daily quota exhausted — `429` Returned when your org has used all 10 free requests for the day on this model. The response includes a `Retry-After` header pointing to the next UTC midnight reset. ```json { "error": { "code": "free_quota_exceeded", "message": "Your organisation has reached the daily free request limit for this model.", "type": "rate_limit_error", "quota_limit": 10, "quota_used": 10, "reset_at": "2026-05-30T00:00:00Z" } } ``` To continue without waiting for the reset, remove the `:free` suffix to route as a standard paid request. *** ### Activity Log All `:free` requests appear in your [Activity Log](https://claude.ai/dashboard/activity) tagged with a **Free** tier indicator. Cost is recorded as `$0.00`. Usage analytics include free-tier traffic separately so it does not skew your paid consumption metrics. *** ### FAQ **Does `:free` support all API parameters?** Yes — structured outputs, tool use, streaming, and all parameters supported by the underlying model work with `:free`. **Can I combine `:free` with `:flex`?** No. `:free` and `:flex` are mutually exclusive suffixes. **Is the 10-request limit shared across all free models, or per model?** Per model. Each model has its own independent quota counter, so using `sarvam/sarvam-105b:free` does not consume quota for any other `:free` model. **What happens to a request if `:free` access is removed from a model?** It returns a `400` error, the same as using `:free` on a model that never had it enabled. The standard model ID continues to work normally. --- # Agent Instructions This documentation is published with GitBook. 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