SWE-1.5

Grok 4.7

xAI

Grok 4.7 is a proprietary xAI language-model release. The September frontier update improves coding, agentic tasks, and knowledge work and is available through the API. It uses text and image inputs and text output, configurable reasoning effort, and tool interfaces. A faster serving option uses the same underlying model and is recorded as a deployment variant, not a separate checkpoint. Weights are not publicly downloadable. Published agent and coding results depend on the evaluation harness, tool permissions, and inference settings, so no unsupported standalone benchmark score is assigned.

SWE-2

Cognition

SWE-2 is Cognition’s Kimi K3-derived coding model, first publicly introduced and served in Devin Desktop and CLI on September 10, 2026. It extends Cognition’s reinforcement-learning recipe to the roughly 2.8T-parameter scale, optimizing several reasoning-effort levels in one training run. Effort-specific cost penalties target the tradeoff between engineering capability and inference cost, while expanded coding environments and hardened verifiers encourage more reliable task completion. The released identity is the trained model rather than the surrounding Devin application. Web and Fusion rollout were announced separately. Public weights and exact model-serving context/output limits are not established by the launch announcement.

Muse Spark 1.3

Meta

Muse Spark 1.3 is a proprietary Meta multimodal reasoning model for coding and agentic knowledge work. The 1.3 update improves long instruction adherence, multi-task coordination, self-awareness of task limits, and cooperation with users during extended work. It accepts text, images, video, and audio and produces text; the API specifies a 1,048,576-token context for these versions. Standard and, where offered, Contributor access use the same model capabilities but different data-use terms. Contributor access is a serving tier rather than a separate model. Future open-weight plans are not a weight release.