MoonshotAI

Kimi K3.1 Pro Highspeed

MoonshotToken-basedDynamic Pricing
Alias:kimi-k3.1-pro-highspeed
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Compare kimi-k3.1-pro-highspeed API pricing, supported endpoints, capabilities and access options on Modelsell.

高速长上下文多模态推理编程工具调用new
Starting price
View full pricing
Context
1M
Maximum input window
Max output
1M
Maximum tokens per response
Modalities
→

Pricing by Supplier

official
官方接口直连
Input/ 1M tokens
$4
Output/ 1M tokens
$20
Cache Read/ 1M tokens
$0.2
Cache Write (5m)/ 1M tokens
$4
Cache Write (1h)/ 1M tokens
$8

Capabilities / Supported modalities

StreamingFunction callingToolsJSON modeStructured outputReasoningVision
Input
Output

Provider & data privacy

Provider
Moonshot AIDocs
Tokenizer
Kimi tokenizer
License
Proprietary (commercial)Proprietary
Data retention50 daysNot used for upstream training by default

Performance

Benchmarks

Scores on standardized evaluations. Higher percentages are better — and rank percentile shows

Metrics sourced fromArtificial Analysis 2026-09-30·Kimi K3.1 Pro Highspeed

This model is not included in the current benchmark snapshot.

Missing models or measurements are not zero scores.

Benchmark charts preserve the source model selection and reasoning settings. Missing models or measurements are not zero scores, and benchmark cost or speed is not this site’s service commitment.

About Kimi K3.1 Pro Highspeed

缩短交互任务中的等待

Kimi K3.1 Pro Highspeed 是 K3.1 Pro 的高速版本,保留同等模型能力、原生视觉理解与 1,048,576 token 上下文。它适合开发者正在等待下一次修改、分析人员需要快速查看研究结果,或应用需要连续执行多个工具步骤的场景。

交互式编程可以按“查看现场、修改、运行、检查”循环推进:提供界面截图、当前代码和验收条件,让模型结合视觉信息完成调整,再用实际运行结果确认。处理研究与金融材料时,可以将表格、报告与图像放进同一任务,要求每个判断对应到证据,涉及计算的部分交给工具复核。

Highspeed 的常规输入、输出和缓存写入单价高于 Pro,缓存命中单价与 Pro 相同。大量固定上下文能否复用,会影响一次完整工作流的实际成本;选择型号时,应结合等待时间、输出量与缓存命中情况比较。

模型始终启用推理,支持 low、high、max 三档 reasoning_effort。速度提升不改变工具执行、数据检查与人工审阅的必要性,也不代表图片或视频生成功能:它理解图像与视频,并以文本、代码和结构化结果参与后续制作。

Use cases and prompting

界面开发迭代示例

“根据当前页面截图和组件源码,修复移动端表格溢出。先确认触发条件,再提交最小修改,运行相关检查,并用新的页面截图验证 320px 宽度下的滚动和点击行为。”

把每轮目标控制在可检查的范围,让工具返回真实页面与测试结果。下一轮完整保留 assistant 消息、reasoning_content 和工具输出,避免工作状态丢失。

接入与预算

使用 /v1/chat/completions,将 model 设为 kimi-k3.1-pro-highspeed。参数规则与 Pro 相同:reasoning_effort 支持 low、high、max,默认 max;始终开启推理,不使用旧版 thinking 开关。建议省略 temperature、top_p、n 和 penalty 参数。

max_completion_tokens 默认 131,072,参数上限 1,048,576,输入与输出需要满足整体上下文预算。简单交互可以先降低推理强度和输出上限,再评估响应质量。流式请求开启 stream_options.include_usage 后,可读取最终用量明细。

视觉输入建议使用 base64 图像;需要 JSON 结果时使用严格 json_schema,只读取最终 message.content。把稳定资料放在请求前缀,避免在前部插入时间戳或随机值,以便复用缓存。

在同一组真实任务上比较 Pro 与 Highspeed 的耗时、输出用量和缓存命中,再决定默认型号。高速版本的实际响应时间仍受上下文长度、推理强度、工具执行和上游负载影响。

API access

API documentation

Code samples

RequestPOST/v1/chat/completions
Example request
Parameters
ParameterTypeDefault / rangeDescription
temperature
number
=10 ~ 2
Sampling temperature; lower is more deterministic
top_p
number
=10 ~ 1
Nucleus sampling probability mass
max_tokens
integer>= 1Maximum number of tokens in the response
frequency_penalty
number
=0-2 ~ 2
Penalises repetition of frequent tokens
presence_penalty
number
=0-2 ~ 2
Encourages introducing new topics
stop
array—Up to 4 strings that stop generation
seed
integer—Deterministic sampling seed (best-effort)
n
integer
=1>= 1
Number of completions to generate
stream
boolean
=false
Stream tokens via Server-Sent Events
response_format
object—Force JSON object or schema-conforming output
tools
array—Tool / function declarations the model may call
tool_choice
string
autononerequired
Tool-choice policy or specific tool name
logprobs
boolean
=false
Return per-token log probabilities
top_logprobs
integer0 ~ 20Number of top log probabilities returned per token
logit_bias
object—Per-token logit bias map
user
string—End-user identifier for abuse monitoring

Replace <YOUR_API_KEY> with the API key from your token settings.

Authentication

All requests must include Authorization: Bearer <TOKEN> header. Anthropic-formatted endpoints accept the x-api-key header instead.

Generate tokens from the Tokens page; you can scope them to specific models, groups, IPs, and rate-limits.

Supported parameters

Generation parameters
ParameterTypeDefault / rangeDescription
temperature
number
=10 ~ 2
Sampling temperature; lower is more deterministic
top_p
number
=10 ~ 1
Nucleus sampling probability mass
max_tokens
integer>= 1Maximum number of tokens in the response
frequency_penalty
number
=0-2 ~ 2
Penalises repetition of frequent tokens
presence_penalty
number
=0-2 ~ 2
Encourages introducing new topics
stop
array—Up to 4 strings that stop generation
seed
integer—Deterministic sampling seed (best-effort)
n
integer
=1>= 1
Number of completions to generate
stream
boolean
=false
Stream tokens via Server-Sent Events
response_format
object—Force JSON object or schema-conforming output
tools
array—Tool / function declarations the model may call
tool_choice
string
autononerequired
Tool-choice policy or specific tool name
logprobs
boolean
=false
Return per-token log probabilities
top_logprobs
integer0 ~ 20Number of top log probabilities returned per token
logit_bias
object—Per-token logit bias map
user
string—End-user identifier for abuse monitoring

Rate limits

SupplierRPMTPMRPD
officialUnlimitedUnlimitedUnlimited

No restriction

Frequently asked questions about kimi-k3.1-pro-highspeed

What is kimi-k3.1-pro-highspeed?

Compare kimi-k3.1-pro-highspeed API pricing, supported endpoints, capabilities and access options on Modelsell.

How do I call kimi-k3.1-pro-highspeed?

Create an API key with access to kimi-k3.1-pro-highspeed, then use the exact model ID and a supported endpoint from the API access section. Request fields depend on the selected endpoint.

How is kimi-k3.1-pro-highspeed priced?

Pricing depends on the selected provider group and the model billing unit. The current input, output, request, or media prices are shown on this page before sign-up.

What is the context window of kimi-k3.1-pro-highspeed?

The model catalog lists a context window of 1048576 tokens. Check the selected endpoint for request limits.

What is the maximum output of kimi-k3.1-pro-highspeed?

The model catalog lists a maximum output of 1048576 tokens. Your request settings may set a lower limit.

How should I evaluate kimi-k3.1-pro-highspeed for my project?

Start with the use cases and prompting guidance on this page, then evaluate the model with representative inputs from your project.