Developers comparing Composer generations
Understand the adaptive reasoning and self-summarization capabilities introduced before the Composer 2 series.
Independent tool overview
Composer 1.5 at a glance
Composer 1.5 was Cursor's February 2026 agentic coding model; it has since been superseded by Composer 2 and the current Composer 2.5 model.
Visit the official Composer 1.5 site ↗
- Developer
- Cursor (Anysphere)
- Released
- February 9, 2026
- Current successor
- Composer 2.5
- Original focus
- Fast, interactive agentic coding
Overview
What Composer 1.5 is
Cursor released Composer 1.5 in February 2026 as a faster, more capable update to its first in-house agentic coding model. It used adaptive reasoning for difficult work and could summarize its own context to continue longer tasks. Cursor said its reinforcement-learning post-training used more than 20 times the scale applied to Composer 1.
Composer 1.5 is no longer the current version to choose. Cursor released Composer 2 in March and Composer 2.5 in May 2026, and its current model catalog lists Composer 2.5 rather than 1.5. The newer model is designed for sustained agent work and more reliable instruction following, so this page is most useful as an explanation of the earlier model and a route to the active Composer family.
Use cases
Who Composer 1.5 is best for
The strongest fit depends on the job you need the product to complete, not the size of its feature list.
Teams evaluating the current Composer model
Use the 1.5 history as context, then test Composer 2.5 on representative repositories and workflows.
Users tracing older Cursor sessions
Identify what the Composer 1.5 label meant in saved conversations, usage reports or February 2026 documentation.
Capabilities
Core Composer 1.5 features
Adaptive reasoning
Composer 1.5 was trained to respond quickly to easier work and spend more time reasoning through difficult codebase tasks.
Context self-summarization
The model could create a working summary when context ran out, allowing an agent to continue exploring longer tasks.
Interactive agent workflow
Cursor positioned 1.5 for day-to-day agentic coding where responsiveness mattered alongside problem-solving ability.
Scaled reinforcement learning
Cursor reported scaling reinforcement-learning post-training more than 20 times beyond Composer 1 on the same pretrained base model.
Active Composer successor
Composer 2.5 now carries the product forward with stronger long-horizon work, complex instruction following and collaboration behavior.
Process
How the Composer 1.5 workflow works
Step 1
Open Cursor and choose a current model
Install or open Cursor, start an agent session and select Composer 2.5 from the current model picker.
Step 2
Give the agent repository context
Describe the goal, relevant constraints and verification requirements, and let the agent inspect the codebase before editing.
Step 3
Review actions and changes
Watch tool use, inspect the proposed diff and interrupt or redirect the agent if it moves outside the intended scope.
Step 4
Run project checks
Treat generated code as a draft: run tests, linting, builds and a manual review before merging.
Cost
Composer 1.5 pricing and free plan
Composer 1.5 is not sold as a separate current plan. Composer 2.5 usage is available through Cursor and is metered by tokens: Standard is $0.50 per million input tokens and $2.50 per million output tokens; Fast is $3 and $15 respectively. Cursor subscriptions include usage pools, with additional usage billed according to the selected model.
Hobby
Free
For trying Cursor with limited agent requests and Tab completions.
- No credit card required
- Limited Agent requests
- Limited Tab completions
Pro
$20/month
The entry individual plan with extended agent limits and frontier-model access.
- Extended Agent limits
- Frontier models
- MCPs, skills and hooks
- Cloud agents
Pro+
$60/month
For developers who use agents daily and need a larger included usage pool.
- Individual plan
- Larger model-usage allowance than Pro
- On-demand usage can add to the monthly total
Ultra
$200/month
For individual power users running substantially more agent work.
- Largest individual included usage pool
- On-demand usage remains available
- Actual consumption depends on model and token usage
Teams Standard
$40/user/month
For organizations that need centralized management and team-wide controls.
- Centralized billing and administration
- Team marketplace
- Usage analytics
- Team-wide privacy mode and SSO
Pricing checked . Check current pricing at the source ↗
Assessment
Composer 1.5 strengths and limitations
Where it stands out
- Introduced adaptive reasoning that balanced speed with deeper work
- Self-summarization helped the model continue beyond a full context window
- Worked directly inside Cursor's code-aware agent environment
- The actively developed Composer line now offers a substantially newer successor
What to consider
- Composer 1.5 has been superseded and is not listed in Cursor's current public model catalog
- Cursor's benchmark claims reflect its own harness and infrastructure, so they should not replace testing on your repositories
- Agentic edits can introduce regressions, security problems or unnecessary changes without human review
- Subscription price is not the full cost ceiling because model usage and optional on-demand usage affect spend
- Repository privacy requirements should be reviewed before sending proprietary code to any hosted model
Compare
Composer 1.5 alternatives
The right alternative depends on the specific output, workflow, controls and budget your project requires.
Coding
Cursor
Use the main Cursor page for a broader view of the editor, agents, supported models and current plans.
Explore Cursor →Coding
Claude Code
Consider Claude Code for Anthropic's terminal-centered coding-agent workflow.
Explore Claude Code →Coding
Codex
Consider OpenAI Codex for parallel cloud and local coding-agent workflows outside the Cursor model family.
Explore Codex →Questions
Composer 1.5 FAQs
What was Cursor Composer 1.5?
Composer 1.5 was Cursor's February 2026 in-house agentic coding model. It focused on interactive speed, adaptive reasoning and self-summarization for longer coding tasks.
Is Composer 1.5 still the current Cursor model?
No. Cursor released Composer 2 and then Composer 2.5, which is the Composer version listed in the current model catalog.
What replaced Composer 1.5?
Composer 2 directly replaced 1.5 in March 2026, followed by Composer 2.5 in May. Cursor says 2.5 improves sustained long-running work, complex instruction following and collaboration behavior.
How much does the current Composer model cost?
Composer 2.5 Standard is listed at $0.50 per million input tokens and $2.50 per million output tokens. Fast is $3 per million input tokens and $15 per million output tokens. Usage is accessed through a Cursor plan.
Should I use Composer 1.5 or Composer 2.5?
Choose Composer 2.5 for current work. Composer 1.5 is useful mainly for historical comparison or understanding older Cursor sessions and documentation.
Bottom line
Our Composer 1.5 verdict
Composer 1.5 was an important step in Cursor's in-house model development, especially for adaptive reasoning and long-task continuity. For new work, use the current Composer 2.5 model and evaluate its quality, speed and token cost on your own codebase rather than seeking out 1.5.
Visit Composer 1.5 website ↗Similar Coding Tools
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