Moonshot route
kimi-k3.1-pro
Kimi K3.1 Pro API access.
Moonshot's new flagship, released 23 October 2026: a post-trained Kimi K3 at $2 / $10 per 1M tokens, one third below K3, with no long-context surcharge. Cache reads are $0.19 per 1M. Reasoning is always on, with effort low / high / max; reasoning tokens bill as output. See the Kimi K3.1 Pro API pricing notes.
Input / 1M tokens
$2.00
Output / 1M tokens
$10.00
Cached input / 1M tokens
$0.19
Context window
1M
Provider
Moonshot
Workload calculator
Put the token rate into context.
These examples apply the published input and output rates directly. Actual cost follows the exact tokens your client sends and the model returns.
This route is the 48th cheapest of 69 comparable text models and cheaper than 17 on the same key. Its context window ranks 13th of 69.
Short request
$0.030
10K input + 1K output
Agent turn
$0.30
100K input + 10K output
Exact token billing
No request minimum
One model ID change
OpenAI compatible
Cost neighbourhood
Nearby routes, same workload.
Every comparison uses the same 100K-input / 10K-output turn. Changing route is a one-line model ID edit.
Price does not measure task quality. For generation routes, see GPT Image 2.
First request
Route it in one call.
Use any OpenAI SDK or tool. Keep the request shape, point the base URL at RouterPlex, and set the model ID shown here.
Read the quickstartcurl https://api.routerplex.com/v1/chat/completions \-H "Authorization: Bearer $ROUTERPLEX_API_KEY" \-H "Content-Type: application/json" \-d '{"model": "kimi-k3.1-pro","messages": [{"role": "user", "content": "Hello!"}]}'
Route notes
Questions before production traffic.
01How much does the Kimi K3.1 Pro API cost?+
Through RouterPlex, Kimi K3.1 Pro costs $2.00 per 1M input tokens and $10.00 per 1M output tokens — the vendor list price with 0% markup, billed per token from a prepaid balance you top up from $5. Cached input tokens are billed at $0.19 per 1M instead of the full input rate, which is most of the prompt on a repeated agent or coding loop.
02What does one Kimi K3.1 Pro agent turn cost?+
A 100K-token input with a 10K-token reply costs about $0.30 on Kimi K3.1 Pro. That makes it the 48th cheapest of 69 comparable text models on RouterPlex, roughly 25.0× the cost of the cheapest option (Muse Spark 1.2 Contributor).
03What is a cheaper alternative to Kimi K3.1 Pro?+
Grok 4.7 from xAI is the closest cheaper model on RouterPlex — $0.26 per agent turn against $0.30 for Kimi K3.1 Pro, at $2.00/1M input and $6.00/1M output. Both run on the same key and the same endpoint, so switching is a one-line model ID change.
04Is Kimi K3.1 Pro cheaper than Gemini 3.1 Pro?+
Yes. Per agent turn, Kimi K3.1 Pro costs about $0.30 against $0.32 for Gemini 3.1 Pro — 6% less.
05What is the context window of Kimi K3.1 Pro?+
Kimi K3.1 Pro supports a 1M token context window on RouterPlex, the 13th largest of the 69 models that publish one.
06Can I use Kimi K3.1 Pro with the OpenAI SDK?+
Yes. RouterPlex serves Kimi K3.1 Pro through an OpenAI-compatible endpoint at https://api.routerplex.com/v1 — point any OpenAI SDK or tool at that base URL with your RouterPlex key and set model to "kimi-k3.1-pro".
Provider family
More from Moonshot.
Deploy this route
Put Kimi K3.1 Pro behind one key.
Top up from $5 with no subscription required.