Kat Coder Air V2.5
Kat Coder Air V2.5 is the fast-response tier of KwaiPilot's KAT-Coder V2.5 pair. It keeps the context window of 256K tokens, output up to 80K tokens, and full tool surface of the Pro tier at a lower price. Your use is subject to KwaiPilot's Terms & Privacy Policies.
import { streamText } from 'ai'
const result = streamText({ model: 'kwaipilot/kat-coder-air-v2.5', prompt: 'Why is the sky blue?'})About Kat Coder Air V2.5
Kat Coder Air V2.5 shipped alongside kat-coder-pro-v2.5 on July 10, 2026 as the fast-response option in the KAT-Coder V2.5 pair. Both models target the same job: acting inside real, executable repositories rather than generating code in a single turn. Kat Coder Air V2.5 handles issue localization, code modification, and test execution as steps in one end-to-end loop.
The capability gap between the two tiers is published rather than implied. KwaiPilot's model comparison lists a SWE-bench figure of 42.4% for Kat Coder Air V2.5 against 65.2% for kat-coder-pro-v2.5. Everything else in that comparison matches: a context window of 256K tokens, output up to 80K tokens, streaming output, context caching, MCP (Model Context Protocol), function calling, and coverage of more than 20 mainstream programming languages. KwaiPilot recommends Kat Coder Air V2.5 for fast-response agent workloads, including native OpenClaw support, and reserves the Pro tier for complex enterprise projects and SaaS integrations.
That split maps onto how coding agents actually run. Routine work dominates request volume: triaging an issue, running a test suite, applying a small patch, summarizing a diff. Send those to Kat Coder Air V2.5 and escalate to kat-coder-pro-v2.5 when a task stalls. Cached input reads bill at $0.03 per million tokens, which keeps resent repository context cheap across long sessions. Route both tiers through AI Gateway via StreamLake and switch with a model identifier change. Product details sit at .