GLM-5.1 vs Kimi K2.5 — Chinese AI Models for Coding Compared
Two Chinese AI models competing for the coding agent space: GLM-5.1 from Zhipu AI and Kimi K2.5 from Moonshot AI. Both are significantly cheaper than Western alternatives. Here’s how they compare.
Update (April 21, 2026): Moonshot AI released Kimi K2.6, which significantly improves on K2.5. See our updated GLM 5.1 vs Kimi K2.6 comparison for the latest numbers.
Head-to-head
| GLM-5.1 | Kimi K2.5 | |
|---|---|---|
| Developer | Zhipu AI (Z.ai) | Moonshot AI |
| Access | Z.ai Coding Plan ($18/mo) | Kimi API / Kimi CLI ($19/mo) |
| Context window | 128K | 256K |
| Agentic coding | Good (via Claude Code) | Excellent (native Agent Swarm) |
| Multi-file edits | ✅ Good | ✅ Excellent |
| Reasoning | Standard | Strong (thinking mode) |
| Image understanding | ❌ | ✅ |
| Companion models | GLM-4.7 (cheap), GLM-5-Turbo | K2.5 only |
| Best tool | Claude Code (Anthropic-compatible API) | Kimi CLI (native) |
GLM-5.1: the Claude Code backend
GLM-5.1’s unique advantage is running through Claude Code via Z.ai’s Anthropic-compatible API. You get the full Claude Code agentic workflow at a fraction of the cost:
# Set Z.ai as Claude Code backend
export ANTHROPIC_BASE_URL="https://api.z.ai/api/anthropic"
export ANTHROPIC_AUTH_TOKEN="your-zai-key"
claude # Now uses GLM-5.1The Z.ai Coding Plan ($18/mo) gives you GLM-5.1, GLM-5-Turbo, GLM-4.7, and GLM-4.5-Air. All consume quota at 1x rate during off-peak hours (outside 14:00-18:00 UTC+8).
Best for: Developers who already use Claude Code and want a cheaper backend for routine tasks.
Kimi K2.5: the native agent
Kimi K2.5 was built for agentic coding from the ground up. Its Agent Swarm feature can parallelize tasks across multiple sub-agents:
- Agent 1 refactors the auth module
- Agent 2 writes tests
- Agent 3 updates documentation
- All running simultaneously
The 256K context window (double GLM’s 128K) means it can hold larger codebases in memory.
Best for: Complex multi-step projects, teams that want native agentic features without Claude Code.
In the AI Startup Race
Both models compete in our AI Startup Race:
- GLM runs through Claude Code on the Z.ai Coding Plan ($18/mo). In test runs, it produced 13 commits in 30 minutes and built a CodeAudit MVP.
- Kimi runs through Kimi CLI ($19/mo). It planned a full Product Hunt launch strategy and showed strong strategic thinking.
Early observation: Kimi plans better, GLM executes faster. Kimi thinks about “who will use this and how do they find it.” GLM just starts coding.
Pricing
| GLM-5.1 | Kimi K2.5 | |
|---|---|---|
| Subscription | $18/mo (Z.ai Coding Plan) | ~$19/mo (Kimi subscription) |
| Includes | 4 models, shared quota | K2.5 access |
| Off-peak bonus | 1x rate (normally 2-3x) | N/A |
| API pricing | Included in plan | ~$0.60/$2.00 per M tokens |
Both are 80-90% cheaper than Claude Code ($20/mo) while being competitive on coding quality.
Which to pick
| Situation | Pick |
|---|---|
| Already use Claude Code | GLM-5.1 (drop-in backend replacement) |
| Want native agent features | Kimi K2.5 (Agent Swarm) |
| Large codebase (>128K tokens) | Kimi K2.5 (256K context) |
| Need multiple model tiers | GLM-5.1 (4 models in one plan) |
| Want cheapest option | GLM-5.1 ($18 vs $19) |
| Need image understanding | Kimi K2.5 (multimodal) |
FAQ
Is GLM better than Kimi?
GLM-5.1 executes faster and works as a drop-in Claude Code backend, making it ideal if you already use Claude Code. Kimi K2.5 plans better, has native Agent Swarm for parallel task execution, and offers a larger 256K context window. GLM is better for rapid coding; Kimi is better for complex multi-step projects.
Are both free?
No, but both are very affordable. GLM-5.1 is available through the Z.ai Coding Plan at $18/month (includes 4 models). Kimi K2.5 is available through a Kimi subscription at ~$19/month or via API at ~$0.60/$2.00 per million tokens. Both are 80-90% cheaper than Claude Code or GPT-based alternatives.
Which is better for coding?
Both are competitive for coding tasks. GLM-5.1 shines at fast autonomous execution through Claude Code and offers multiple model tiers for different task complexities. Kimi K2.5 excels at complex multi-file projects thanks to its Agent Swarm parallelization and larger context window. Pick GLM for speed, Kimi for complex orchestration.
Related: GLM-5.1 Complete Guide · GLM-5.1 Claude Code Setup · Kimi K2.5 Complete Guide · Kimi CLI Guide · MiniMax vs GLM vs Kimi · AI Startup Race