Overview
Cursor Composer is an AI coding model developed by Cursor, built specifically for autonomous software engineering inside the Cursor IDE. Unlike general-purpose language models adapted for code completion, Composer is trained end-to-end for long-horizon coding tasks — handling multi-file edits, terminal commands, iterative debugging, and refactoring sequences that can span hundreds of incremental steps without human checkpoints.
Composer 2, released March 19, 2026, is a significant generational upgrade. It scores 61.3 on CursorBench (up from 44.2 in v1.5), 61.7 on Terminal-Bench 2.0 (up from 47.9), and 73.7 on SWE-bench Multilingual (up from 65.9) — placing it at frontier level for coding benchmarks. The model is available in two variants: a standard version priced at $0.50/M input and $2.50/M output tokens, and a faster variant at $1.50/M input and $7.50/M output tokens. The faster variant is now the default in Cursor.
Composer operates within Cursor's IDE and is the model that powers the agentic workflows at the core of the Cursor product. For developers evaluating AI agent tools for coding, Cursor Composer is notable for being purpose-built for IDE-integrated, long-context software engineering rather than general-purpose reasoning.
Key Features
Long-horizon autonomous coding — Composer 2 is designed to complete challenging tasks that require hundreds of sequential actions: writing code, running terminal commands, interpreting output, and correcting errors across multiple iterations. It can close the loop on bugs without manual intervention for each step.
Multi-file editing — Composer operates across your entire repository rather than one file at a time. You can describe a task like "refactor the authentication system" and Composer will identify which files need changes, apply edits consistently, and respect project conventions throughout.
Terminal-Bench performance — Terminal-Bench 2.0 specifically measures the ability to identify a bug, write a fix, and verify it in a CLI environment without human intervention. Composer 2 scores 61.7, up from 47.9 in v1.5, reflecting meaningful improvements in autonomous debugging loops.
Two speed variants — Standard Composer 2 at $0.50/M input / $2.50/M output tokens prioritizes cost efficiency for prototyping and routine tasks. The fast variant at $1.50/M input / $7.50/M output tokens is the default option, optimized for real-time IDE interaction where latency matters more than per-token cost.
Multilingual codebase support — SWE-bench Multilingual score of 73.7 reflects Composer 2's ability to work across codebases in multiple programming languages. The 73.7 SWE-bench Multilingual score suggests strong multilingual coding performance across polyglot repositories.
Continued pretraining and RL training — Composer 2 was built using continued pretraining on high-quality code combined with reinforcement learning optimized for long-horizon tasks. This is distinct from simply fine-tuning a general-purpose model, and is what enables the step-level consistency needed for multi-hundred-action sequences.
How It Compares
Cursor Composer 2 occupies a specific position in the AI coding model landscape: an IDE-native model optimized for sustained agentic execution rather than single-turn code generation.
vs. Claude Code — Claude Code is a terminal-first agent that also handles long-horizon coding tasks and integrates via MCP. Both target autonomous software engineering, but Claude Code operates from the terminal while Composer is native to the Cursor IDE editor experience. Teams already in Cursor will find Composer more integrated; those preferring terminal-based workflows may prefer Claude Code.
vs. Codex (GPT-5.3) — Codex offers strong general-purpose coding with deep computer-use integration but is not IDE-native in the same way Composer is. Composer 2's 61.7 Terminal-Bench 2.0 score supports strong autonomous CLI debugging performance in closed-loop scenarios.
vs. DeepSeek-V3 — DeepSeek-V3 may be attractive for general coding use cases, but it lacks the native IDE integration that defines Composer 2's workflow. Composer 2 is embedded in the IDE session rather than requiring an API call from a separate tool.
vs. OpenAI o3 — o3 is often considered strong on complex reasoning tasks. Composer 2's design prioritizes real-time IDE responsiveness alongside repository-wide capability, which may suit different workflow cadences.
Pricing & Plans
Cursor Composer is primarily accessed through Cursor, and Cursor also says Composer 2 is available in the early alpha of its new interface. Cursor offers the following subscription plans:
| Plan | Price | Composer access |
|---|---|---|
| Hobby | Free | Limited Agent requests |
| Pro | $20/month | Extended Agent limits, access to frontier models |
| Pro+ | $60/month | 3× usage on all OpenAI, Claude, Gemini models |
| Ultra | $200/month | 20× usage on all models, priority access to new features |
| Teams | $40/user/month | Everything in Pro + centralized billing, SAML/OIDC SSO |
| Enterprise | Custom | Pooled usage, SCIM, AI code tracking API, priority support |
Composer 2 itself is priced at the model level for usage beyond plan-included quotas:
| Variant | Input | Output |
|---|---|---|
| Standard | $0.50 / M tokens | $2.50 / M tokens |
| Fast (default) | $1.50 / M tokens | $7.50 / M tokens |
Cursor positions Composer 2 as lower cost than other fast models in its announcement. Individual plans include standalone usage pools.
Best For
- Software engineers already using Cursor IDE who want the most capable native coding agent for multi-file and terminal-integrated tasks
- Teams doing repository-wide refactoring, multilingual codebase management, or iterative debugging loops
- Developers evaluating AI code review and analysis tools who also need autonomous fix-and-verify capability
- Growth-stage engineering teams on the Pro or Teams plan who want to maximize agentic coding throughput without external API overhead
- Developers comparing coding agents who prioritize IDE-native integration over terminal-first or standalone approaches
FAQ
What is Cursor Composer?
Cursor Composer is an AI coding model built by Cursor for autonomous software engineering tasks inside the Cursor IDE. It handles multi-file edits, terminal commands, and iterative debugging across long sequences of steps. Composer 2 is the latest version, released March 19, 2026.
How is Composer 2 different from Composer 1 and 1.5?
Composer 2 scores 61.3 on CursorBench (up from 44.2 in v1.5 and 38.0 in v1), 61.7 on Terminal-Bench 2.0 (up from 47.9 in v1.5), and 73.7 on SWE-bench Multilingual (up from 65.9 in v1.5). The training approach combines continued pretraining on high-quality code with reinforcement learning specifically optimized for long-horizon tasks.
How is Cursor Composer different from Claude Code or Codex?
Cursor Composer is native to the Cursor IDE, meaning it operates directly within your editor session, reads your open files, and can execute terminal commands within the same workflow. Claude Code is a terminal-first agent, and Codex operates via API with computer-use integration. The choice depends on whether you prefer IDE-native or terminal-native agentic workflows. For tool comparison across coding agents, Inspector provides a visual layer for managing coding agent outputs.
What does Terminal-Bench 2.0 measure?
Terminal-Bench 2.0 measures a model's ability to close the debugging loop independently in a CLI environment — identifying a bug, writing a fix, and verifying the solution without human intervention between steps. Composer 2's score of 61.7 (up from 47.9 in v1.5) reflects its improved autonomous debugging capability.
Do I need a paid Cursor plan to use Composer 2?
Cursor's Hobby plan is free and includes limited Agent requests. For extended use of Composer 2, the Pro plan at $20/month provides higher Agent limits and access to frontier models. Teams and Enterprise plans add shared billing, SSO, and usage analytics.
What is the difference between Standard and Fast Composer 2?
Standard Composer 2 costs $0.50/M input and $2.50/M output tokens and is suited for prototyping, boilerplate generation, and tasks where real-time speed is less critical. The Fast variant costs $1.50/M input and $7.50/M output tokens but responds quickly enough for real-time IDE interaction. The Fast variant is now the default in Cursor.
Is Cursor Composer available outside the Cursor IDE?
No. Composer 2 is not offered as a standalone API, but Cursor says it is available in Cursor and in the early alpha of its new interface as of March 2026.
What is CursorBench?
CursorBench is Cursor's internal benchmark for measuring coding model performance on complex, realistic engineering tasks. Composer 2 scores 61.3, compared to 44.2 for Composer 1.5 and 38.0 for Composer 1.
