Kimi K2.5’s Agent Swarm is the most unique feature in AI coding tools — it coordinates up to 100 parallel sub-agents working on the same codebase simultaneously. Here’s how it actually works.

Update (April 21, 2026): Kimi K2.6 scales Agent Swarm to 300 sub-agents executing 4,000 coordinated steps. On BrowseComp (Agent Swarm), K2.6 scores 86.3% vs GPT-5.4’s 78.4%. The architecture below still applies, just at 3x the scale.

How Agent Swarm works

1. Task decomposition

When you give Kimi a large task, the coordinator agent breaks it into independent subtasks:

You: "Refactor all 30 API route handlers to use the new middleware pattern"

Coordinator splits into:
  - Agent 1: routes/users.ts
  - Agent 2: routes/products.ts
  - Agent 3: routes/orders.ts
  ... (up to 30 parallel agents)

2. Parallel execution

Each sub-agent works independently on its assigned files. They share read access to the full codebase but only write to their assigned files.

3. Conflict resolution

The coordinator monitors for conflicts — if Agent 1 and Agent 3 both try to modify a shared utility file, the coordinator serializes those changes and resolves conflicts.

4. Result merging

Once all agents complete, the coordinator merges results, runs validation, and presents the combined diff.

When Agent Swarm helps

Great for (4.5x speedup):

• Batch refactoring across many files
• Adding error handling to all routes
• Updating imports after a module rename
• Generating tests for multiple modules
• Documentation generation

Not helpful for:

• Single-file changes
• Tasks with heavy dependencies between files
• Architecture decisions (need sequential reasoning)
• Debugging (need to trace execution flow)

Performance

Task	Sequential	Agent Swarm	Speedup
Refactor 30 files	~45 min	~10 min	4.5x
Add tests for 20 modules	~60 min	~15 min	4x
Update 50 imports	~30 min	~8 min	3.7x
Single complex bug fix	~10 min	~10 min	1x (no benefit)

Quota awareness

Agent Swarm consumes tokens fast. The 5-hour quota system allocates 300-1,200 API calls per window with max concurrency of 30. A large swarm task can burn through your quota quickly.

Tips:

• Start with 5-10 agents, not 100
• Use plan mode first to verify the approach
• Monitor token usage during swarm execution
• Use the Kimi Code Pro plan ($19/mo) for higher quotas

Using Agent Swarm

Via Kimi CLI:

kimi
> /swarm 10  # Use 10 parallel agents
> Refactor all route handlers to use async error wrapper

The swarm feature is also available via the Kimi API for custom integrations.

Agent Swarm vs alternatives

No other tool offers true parallel agent execution:

• Claude Code — Sequential only
• Codex CLI — Parallel via Git worktrees (different branches, not same codebase)
• Aider — Sequential only
• OpenCode — Parallel agents but simpler coordination

Agent Swarm is the only option for coordinated parallel work on the same codebase.

Related: Kimi K2.5 Complete Guide · Kimi CLI Complete Guide · How to Build an AI Agent · Minimax M2 7 Agentic Coding