Models

Claude Sonnet 4.6 vs Kimi K3

Output tokens cost $15.00 per million on Claude Sonnet 4.6 and $15.00 per million on Kimi K3. Input tokens cost $3.00 per million on Claude Sonnet 4.6 and $3.00 per million on Kimi K3. Cached input tokens are billed at $3.00 per million on Claude Sonnet 4.6 and $0.30 per million on Kimi K3. Context lengths are 1,000,000 tokens on Claude Sonnet 4.6 and 1,048,576 tokens on Kimi K3. Time to first token (TTFT) measured on AIHubMix is 0.9s on Claude Sonnet 4.6 and 0.9s on Kimi K3. Measured output throughput is 63.4 tok/s on Claude Sonnet 4.6 and 73.1 tok/s on Kimi K3. On the LMArena coding leaderboard Claude Sonnet 4.6 scores 1528 and Kimi K3 scores 1531.

AnthropicClaude Sonnet 4.6Moonshot AIKimi K3
Anthropic logo
Claude Sonnet 4.6
Anthropic · text, image → text

Claude Sonnet 4.6 delivers frontier intelligence at scale—built for coding, agents, and enterprise workflows. Use cases include: Agents: Sonnet 4.6 excels at complex, multi-step tasks requiring sustained reasoning and adaptive decision-making—ideal for workflows where reliability and autonomy matter most. Coding: Sonnet 4.6 is built for iterative development work, handling complex codebases without losing quality as you guide it through building, refactoring, and debugging. It can compress multi-day projects into hours with the technical depth to deliver production-ready solutions. Enterprise workflows: Sonnet 4.6 powers agents that manage professional projects from start to finish, leveraging memory to maintain context across files with a step-change improvement in creating spreadsheets, slides, and docs. Financial analysis: Sonnet 4.6 connects the dots across regulatory filings, market reports, and internal data—enabling sophisticated modeling and proactive compliance. Cybersecurity: Sonnet 4.6 brings professional-grade analysis to security workflows, correlating logs, vulnerability databases, and threat intelligence for proactive threat detection and automated incident response. Computer use: Sonnet 4.6 delivers confident, consistent navigation with more human-like browsing—enabling better web QA, workflow automation, and advanced user experiences.

Input$3.00 /M
Output$15.00 /M
Moonshot AI logo
Kimi K3
Moonshot AI · text, image, video → text

Kimi K3 is Kimi’s flagship model for long-horizon coding and end-to-end knowledge work, with a 1M-token context window and industry-leading intelligence.

Input$3.00 /M
Output$15.00 /M

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

Claude Sonnet 4.6
Kimi K3
Input /M
$3.00
$3.00
Output /M
$15.00
$15.00
Cache read /M
$3.00
$0.30
Context length
1,000,000
1,048,576
Max output
64,000
1,048,576
Time to First Token
0.9 s
0.9 s
Throughput
63.4 tok/s
73.1 tok/s
Modalities
textimage
textimagevideo
Supported Parameters
thinkingtoolsfunction callingstructured outputs
thinkingfunction callingstructured outputs
API Formats
chat_completions · gemini_api · claude_api
Released
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-

Promotional prices show the discounted rate; see each model page for promotion windows.

Activity Past 30 Days

Daily traffic served through AIHubMix — how demand for each model is trending.

claude-sonnet-4-6kimi-k3

Tokens / day

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Requests / day

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Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

claude-sonnet-4-6kimi-k3

Throughput (tok/s)

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TTFT (s)

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Uptime (%)

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LMArena Benchmarks

LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.

Text
claude-sonnet-4-6kimi-k3
1420146015001540
Overall
14721486
Coding
15281531
Math
14631463
Hard prompts
15031505
Instruction following
14761479
Multi-turn
14811499
Creative writing
14501470
Longer query
14931502
Chinese
15101527
English
14841491

Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.

Cost calculator

Estimate your monthly bill for the same workload on each model.

Claude Sonnet 4.6
$405 /mo
Kimi K3
$405 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

Which is cheaper: Claude Sonnet 4.6, Kimi K3?

Claude Sonnet 4.6: $15.00/M output tokens; Kimi K3: $15.00/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

Kimi K3: 1531; Claude Sonnet 4.6: 1528 (LMArena coding leaderboard).

Which responds faster?

Claude Sonnet 4.6: 0.9s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.

How large is each context window?

Claude Sonnet 4.6 accepts 1,000,000 and Kimi K3 accepts 1,048,576 input tokens. Maximum output per request is 64,000 tokens on Claude Sonnet 4.6 and 1,048,576 tokens on Kimi K3.

Which one generates tokens faster?

Kimi K3 at 73.1 tok/s and Claude Sonnet 4.6 at 63.4 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

Claude Sonnet 4.6 accepts text and image input and supports thinking, tool calling, function calling and structured outputs; Kimi K3 accepts text, image and video input and supports thinking, function calling and structured outputs.

Can I call Claude Sonnet 4.6 and Kimi K3 with the same API key?

Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.

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