Aion-2.0
- input
- $0.50
- output
- $2.50
- Released
- 7mo ago
Cost/1M tokens
Cursor's agent coding model, built with continued pretraining and reinforcement learning on Moonshot's open Kimi K2.5. Available only in Cursor, with a fast variant as the default.
How it compares
Family tree
Models trained from one another, as their makers describe it.
Kimi K2.5Moonshot AI · 2026
Frequently asked questions
API and pricing
Composer 2 costs $0.50 per 1M tokens for input and $2.50 per 1M tokens for output. There are 0 paid providers tracked.
A typical request with 10,000 input tokens and 1,000 output tokens costs $0.0075 at the listed price.
Capabilities and specs
No. Composer 2's only listed input modality is text, so it does not accept images, audio, video or PDFs.
Quality and benchmarks
Matched on model kind, blended price and release date, the alternatives are Aion-2.0 by AionLabs at $1.00 per 1M tokens, Grok Build 0.1 by xAI at $1.25 per 1M tokens, and Qwen3.6 Plus by Qwen at $0.7313 per 1M tokens.
Aion-2.0Composer 2 vs Aion-2.0Grok Build 0.1Composer 2 vs Grok Build 0.1Qwen3.6 PlusComposer 2 vs Qwen3.6 Plus
Kimi K3 is the best open-weight alternative, the highest-ranked open-weight model on Arena Text at rank 19. Composer 2 itself is closed.
Versions and lineage
Composer 2 is based on Kimi K2.5.
Licensing and access
No, Composer 2 is closed and its license is proprietary.
Basics
Composer 2 was made by Cursor and released on March 19, 2026.
No. Composer 2 is closed and its listed API price is $0.50 input and $2.50 output per 1M tokens.
Generated from Vertical Tabs data, updated November 12, 2026.
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