SWE-2 Models by Cognition

CognitionProprietaryCodingAgents

1 model2026

Last refreshed 2026-09-10. Next refresh: weekly.

Details

ResearcherCognition

LicenseProprietary

Commercial useCommercial use: conditional

Models1

Released2026

Capabilities

ReasoningAll models

JSON / Tool useAll models

Code ExecutionAll models

Links

Website

About

Cognition's SWE-2 coding model family for agentic software-engineering work, available through Devin product surfaces and optimized for cost-efficient frontier coding performance. Launched September 10, 2026, post-trained from the Kimi K3 2.8T-parameter base with multi-trillion-parameter RL that trains all reasoning-effort levels in a single run.

Decision facts

Best fit: codingagentsreasoning
Capability starting point: SWE-2 with reasoning and JSON / Tool use
Lowest tracked input: Not tracked
Closest related family: Agents-A1

Current Variants

Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.

1 in view

SWE-2Current

Use when the workload needs coding, reasoning, and JSON / Tool use.

2026-09codingreasoningJSON / Tool use

Current SWE-2 variants with use-when guidance and lifecycle status
Model	Use when	Released	Signals	Status
SWE-2	Use when the workload needs coding, reasoning, and JSON / Tool use.	2026-09	codingreasoningJSON / Tool use	Current

Release Timeline

1 release group

2026-09

1 current

SWE-2

codingreasoningJSON / Tool use

Current

Specifications(1 models)

SWE-2 model specifications comparison
Model	Released	Parameters	Reasoning	JSON / Tool use	Code Exec
SWE-2	2026-09	2.8T (base: Kimi K3)	Yes	Yes	Yes

Available From(1 provider)

Devin

Models(1)