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Muse Spark 1.3 vs Kimi K3 vs Grok 4.6

Three of the newest flagships in the catalog. New models carry launch benchmarks; the live telemetry plane fills in measured speed and reliability as traffic accrues.Last reviewed 2026-09-09.

Muse Spark 1.3 vs Kimi K3 vs Grok 4.6

At a glance

Meta's latest multimodal reasoning model for long-running agentic, multi-agent, and coding workflows.

1.0M ctx$1.25/$4.25 per M

MoonshotAI's 2.8T-parameter flagship for complex coding, knowledge work, and long-horizon agent runs.

1.0M ctx$3.00/$15.00 per M

xAI's smartest model, with frontier performance on coding, knowledge work, and STEM.

500K ctx$2.00/$6.00 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
The paired significance test (McNemar, in "Measured on Idapt") appears only when exactly two models are pinned.
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper33%
Reasoning & Knowledge
Graduate Science—Expert-Level—
Agentic
Terminal Tasks—
Reasoning
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-16
Reasoning & Knowledge
Graduate Science93.5%Expert-Level43.5%
Agentic
Terminal Tasks88.3%
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Reasoning & Knowledge
Graduate Science—Expert-Level—
Agentic
Terminal Tasks—
Specs
1.0M
Context
256K
Max output
Sep 2026
Released
1.0M
Context
16K
Max output
Jul 2026
Released
500K
Context
128K
Max output
Aug 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input38%$1.25/M tokens
Output29%$4.25/M tokens
Cache read50%$0.15/M tokens
Web search50%$0.003/search
Live pricing, shown before you run
Input$3.00/M tokens
Output$15.00/M tokens
Cache read$0.30/M tokens
Live pricing, shown before you run
Input$2.00/M tokens
Output$6.00/M tokens
Cache read$0.50/M tokens
Web search$0.005/search
Chat with Muse Spark 1.3Go to model
Chat with Kimi K3Go to model
Chat with Grok 4.6Go to model

Frequently asked

Which of Muse Spark 1.3, Kimi K3, and Grok 4.6 is the cheapest?

Muse Spark 1.3 has the lowest blended list price. Per 1M tokens: Muse Spark 1.3 at $1.25 in / $4.25 out; Kimi K3 at $3.00 in / $15.00 out; Grok 4.6 at $2.00 in / $6.00 out.

Which of Muse Spark 1.3, Kimi K3, and Grok 4.6 has the largest context window?

Muse Spark 1.3 leads with 1M tokens. The other two: Kimi K3 at 1M, Grok 4.6 at 500K.

Do Muse Spark 1.3, Kimi K3, and Grok 4.6 support image input?

Yes, all three accept images.

Where can I run Muse Spark 1.3, Kimi K3, and Grok 4.6 side by side?

This idapt comparison runs all three in aligned columns: the same prompt, plus benchmarks, specs, and prices per model. Open any model in chat from its column to keep working with it.

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