API cost decision in 10 seconds

Grok 4.3 vs 🔥Kimi K2.6

Pick Kimi K2.6 for lower cost; pick Grok 4.3 only if the larger context window matters more.

Pricing data updated:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Kimi K2.6 for lower cost; pick Grok 4.3 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Kimi K2.6 is estimated at $2.48 vs $2.5 for Grok 4.3, saving $0.02 (1% lower).

Cost-first pickKimi K2.6
Context-first pickGrok 4.3
Sample savings$0.021%
10x traffic gap$0.25

Grok 4.3 has more context, but Kimi K2.6 saves $0.02 on the standard workload. At 10x that traffic, the same price gap is about $0.25. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Cost winner changes by workload shape: input-heavy / RAG favors Kimi K2.6, balanced workload favors Grok 4.3, and output-heavy chatbot favors Grok 4.3.

Workload shapeToken mixBetter pickGrok 4.3Kimi K2.6
Input-heavy / RAG 5M input + 500K output Kimi K2.6 $7.5 $5.39
Balanced workload 1M input + 1M output Grok 4.3 $3.75 $4.22
Output-heavy chatbot 1M input + 5M output Grok 4.3 $13.75 $18.18
Cheaper inputKimi K2.6$1.25 vs $0.73 / 1M
Cheaper outputGrok 4.3$2.5 vs $3.49 / 1M
Larger contextGrok 4.31M vs 262.14K
Sample workloadKimi K2.6$2.5 vs $2.48

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Grok 4.3Calculating…Estimated API cost
Kimi K2.6Calculating…Estimated API cost
Cheaper for this workloadCalculating…Difference: calculating…

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Quick Decision

Verdict

Kimi K2.6 has the lower input price, Grok 4.3 has the lower output price, and Grok 4.3 offers the larger context window.

For a 1M input token plus 500K output token workload, the estimated API cost is $2.5 for Grok 4.3 and $2.48 for Kimi K2.6.

Best Fit

Choose Grok 4.3 when you care most about lower output-token price, and larger context window.

Choose Kimi K2.6 when you care most about lower input-token price.

Head-to-Head Specs
FeatureGrok 4.3
(xAI)		🔥Kimi K2.6
(MoonshotAI)
Input Price
prompt tokens per 1M		$1.25$0.73
Completion Price
per 1M tokens		$2.5$3.49
Sample Workload Cost
1M input + 500K output		$2.5$2.48
Context Window1M262.14K
Release Date2026-04-302026-04-20
Popularity#12
Grok 4.3

Grok 4.3 is a reasoning model from xAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...

Kimi K2.6

Kimi K2.6 is Moonshot AI's next-generation multimodal model, designed for long-horizon coding, coding-driven UI/UX generation, and multi-agent orchestration. It handles complex end-to-end coding tasks across Python, Rust, and Go, and...

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionKimi K2.6On the standard 1M input plus 500K output workload, Kimi K2.6 is estimated at $2.48 vs $2.5 for Grok 4.3, saving $0.02 (1% lower).
High-volume input processingKimi K2.6Lower prompt-token price matters most when prompts or retrieved passages dominate the bill.
Long responses and chatbotsGrok 4.3Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workGrok 4.3A larger context window leaves more room for retrieved passages and source files.