aster-work: $0.40 input / $0.80 output per million tokens. aster-code: $0.80 input / $1.60 output per million tokens. No subscription or seat fees. Prepaid credits start at $5 with no expiry. Routing included in product rates.
Free during beta. Self-hosted is free under Apache 2.0 license. Enterprise options available on request.
Key features
Task-aware model routing
Curated model collection
Prompt versioning with named aliases and diffs
Server-side prompt templating with conditionals and loops
OpenAI-compatible AI gateway with automatic model fallbacks
Virtual keys, budgets and per-key rate limits
LLM tracing through the gateway or over OpenTelemetry
Versioned tool catalog for function calling
Offline experiments and online evaluation rules
Prompt optimization with candidate rewrites
Team-wide audit trail of every change
MCP server for Claude Code, Claude Desktop, Cursor
What makes it different
Reinforcement learning router trained on real task data
97.5% lower token cost vs frontier models
Same product name regardless of underlying model
Change prompts without a deploy by moving production alias
Aster
AcruxCore