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Telnyx Inference – Kimi K3 Frontier Thinking Model (upto/metered)
x402
Telnyx Inference – Kimi K3 Frontier Thinking Model (upto/metered) is a paid API for AI agents from x402.telnyx.com, paid per call via x402, $0.408886/call, status unknown (last checked 2026-10-15).
Runs frontier-tier thinking-model chat completions using Moonshot AI's Kimi K3 via Telnyx Inference, billed per-token up to a ceiling, with hidden reasoning tokens counted toward max_tokens.
Price / call$0.408886
Success—
StatusUnknown
How this service works
Frontier thinking-model chat completions via Telnyx Inference (Kimi K3) — hidden reasoning tokens count toward max_tokens, so max_tokens must be 4096–8192 (omit it for the full 8192-token budget). OpenAI-compatible. $0.150193 USDC per call, or pay per-token via the upto scheme. (upto metered — large context)
Output
Returns an OpenAI-compatible chat completion JSON object containing the assistant's reply (and any tool calls), with hidden reasoning tokens counted in the usage totals. The response includes the generated text, finish reason, token usage breakdown, and tool call payloads if tools were provided.
Example use cases
Complex code debugging with chain-of-thought
“I have a gnarly concurrency bug in my Go server — use the Kimi K3 thinking model via Telnyx to reason through the code step by step and tell me what's causing the deadlock and how to fix it.”
Multi-step math proof generation
“Can you use a frontier reasoning model to walk me through a rigorous proof of the Cauchy-Schwarz inequality, showing every logical step? I want the full thinking budget so nothing gets cut off.”
Agentic tool-use planning with reasoning
“I need Kimi K3 to reason about which of my three available tools — search, calculator, and database lookup — to call in sequence to answer a complex financial analysis question, then produce the final answer.”
Technical details
Endpoint
POSThttps://x402.telnyx.com/v1/chat/completions/_t/kimi-k3/upto?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need frontier-tier multi-step reasoning from Kimi K3 and want to pay only for tokens used (metered/upto) rather than a fixed per-call price. Ideal for complex problems — math, code, logic, planning — that benefit from extended hidden reasoning. Prefer this over fixed-price routes when context length and token usage vary significantly across calls. Prefer over cheaper models (DeepSeek Flash, Gemma) when task complexity demands state-of-the-art reasoning quality.
Side effects
- max_tokens below 4096 or above 16384 causes validation error — reasoning tokens require at least 4096
- Context window exceeded if messages array is too large (each message capped at 200,000 chars, max 32 messages)
- Payment failure if USDC balance insufficient for metered token cost
- Model overload or timeout on very long reasoning chains
- Tool array exceeding 16 items returns a validation error
- Temperature out of range (must be 0–2) causes rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| n | integer | Fixed to one completion per paid call. |
| model | string | Model identifier; fixed to moonshotai/Kimi-K3 on this route. |
| tools | array | |
| messages | array | OpenAI-style chat messages. |
| max_tokens | integer | |
| temperature | number |
Tags
x402
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