Model Comparison

Kimi K2 0905 vs Kimi K2 Instruct

Kimi K2 0905 significantly outperforms across most benchmarks. Kimi K2 Instruct is 2.1x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Kimi K2 0905 outperforms in 5 benchmarks (AIME 2024, GPQA, HumanEval, MMLU, MMLU-Pro), while Kimi K2 Instruct is better at 0 benchmarks.

Kimi K2 0905 significantly outperforms across most benchmarks.

Sun May 24 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Kimi K2 Instruct costs less

For input processing, Kimi K2 0905 ($0.60/1M tokens) is 1.2x more expensive than Kimi K2 Instruct ($0.50/1M tokens).

For output processing, Kimi K2 0905 ($2.50/1M tokens) is 5.0x more expensive than Kimi K2 Instruct ($0.50/1M tokens).

In conclusion, Kimi K2 0905 is more expensive than Kimi K2 Instruct.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers

Sun May 24 2026 • llm-stats.com

Kimi K2 0905

Input tokens$0.60

Output tokens$2.50

Best providerNovita

Kimi K2 Instruct

Input tokens$0.50

Output tokens$0.50

Best providerFireworks

Notice missing or incorrect data?Start an Issue→

Model Size

Parameter count comparison

0.0M diff

Kimi K2 Instruct has 0.0B more parameters than Kimi K2 0905, making it 0.0% larger.

Kimi K2 0905

1.0Tparameters

Kimi K2 Instruct

1.0Tparameters

1000.0B

Kimi K2 0905

1000.0B

Kimi K2 Instruct

Context Window

Maximum input and output token capacity

Kimi K2 0905 accepts 262,144 input tokens compared to Kimi K2 Instruct's 200,000 tokens. Kimi K2 0905 can generate longer responses up to 262,144 tokens, while Kimi K2 Instruct is limited to 200,000 tokens.

Kimi K2 0905

Input262,144 tokens

Output262,144 tokens

Kimi K2 Instruct

Input200,000 tokens

Output200,000 tokens

Sun May 24 2026 • llm-stats.com

License

Usage and distribution terms

Kimi K2 0905 is licensed under a proprietary license, while Kimi K2 Instruct uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Kimi K2 0905

Proprietary

Closed source

Kimi K2 Instruct

MIT

Open weights

Release Timeline

When each model was launched

Kimi K2 0905 was released on 2025-09-05, while Kimi K2 Instruct was released on 2025-07-11.

Kimi K2 0905 is 2 months newer than Kimi K2 Instruct.

Kimi K2 0905

Sep 5, 2025

8 months ago

1mo newer

Kimi K2 Instruct

Jul 11, 2025

10 months ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Kimi K2 0905 is available from Novita. Kimi K2 Instruct is available from Fireworks, Novita.

Kimi K2 0905

Novita

Input Price:Input: $0.60/1MOutput Price:Output: $2.50/1M

Kimi K2 Instruct

Fireworks

Input Price:Input: $0.50/1MOutput Price:Output: $0.50/1M

Novita

Input Price:Input: $0.57/1MOutput Price:Output: $2.30/1M

* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Kimi K2 0905

View details

Moonshot AI

Larger context window (262,144 tokens)

Higher AIME 2024 score (72.0% vs 69.6%)

Higher GPQA score (75.8% vs 75.1%)

Higher HumanEval score (94.5% vs 93.3%)

Higher MMLU score (90.2% vs 89.5%)

Higher MMLU-Pro score (82.5% vs 81.1%)

Kimi K2 Instruct

View details

Moonshot AI

Less expensive input tokens

Less expensive output tokens

Has open weights

Detailed Comparison

AI Model Comparison Table
Feature	Kimi K2 0905	Kimi K2 Instruct

FAQ

Common questions about Kimi K2 0905 vs Kimi K2 Instruct.

Which is better, Kimi K2 0905 or Kimi K2 Instruct?

Kimi K2 0905 significantly outperforms across most benchmarks. Kimi K2 0905 is made by Moonshot AI and Kimi K2 Instruct is made by Moonshot AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Kimi K2 0905 compare to Kimi K2 Instruct in benchmarks?

Kimi K2 0905 scores HumanEval: 94.5%, MMLU: 90.2%, MATH: 89.1%, MMLU-Pro: 82.5%, GPQA: 75.8%. Kimi K2 Instruct scores MATH-500: 97.4%, GSM8k: 97.3%, CBNSL: 95.6%, HumanEval: 93.3%, MMLU-Redux: 92.7%.

Is Kimi K2 0905 cheaper than Kimi K2 Instruct?

Kimi K2 Instruct is 1.2x cheaper for input tokens. Kimi K2 0905 costs $0.60/M input and $2.50/M output via novita. Kimi K2 Instruct costs $0.50/M input and $0.50/M output via fireworks.

What are the context window sizes for Kimi K2 0905 and Kimi K2 Instruct?

Kimi K2 0905 supports 262K tokens and Kimi K2 Instruct supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Kimi K2 0905 and Kimi K2 Instruct?

Key differences include context window (262K vs 200K), input pricing ($0.60 vs $0.50/M), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.