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Models Desk / Cognition SWE-2 / Source-backed briefing / 2026-09-12
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Models Desk / Cognition / Posted Sep 10 / Briefing Sep 12

SWE-2 Hits 50.0% On FrontierCode. Cognition Says 64% Cheaper Than Fable.

Cognition’s Sep 10 post introduces SWE-2 as its most advanced coding model yet: 50.0% on FrontierCode 1.1 Main, within one point of Fable 5.1 at a claimed 64% lower cost. Live in Devin Desktop and CLI today. Web and Fusion are rolling. No API or weights in the post.

Quick answerCognition numbers from the Sep 10 SWE-2 post: FrontierCode 1.1 Main 50.0% (Fable 5.1 50.9%), DeepSWE 1.1 73.0%, Terminal-Bench 2.1 92.8%, Terminal-Bench 4 27.3%. Base is Kimi K3 (2.8T). Available in Devin Desktop and CLI; Web and Fusion rolling. The post does not ship a public API or weights. Foreign coding agent ≠ private Alberta path.

On September 10, 2026, Cognition introduced SWE-2—post-trained from Kimi K3, a 2.8T-parameter model, and framed as pushing the Pareto frontier of coding capability and cost. Every score below is a Cognition number from that post. This desk is not inventing an independent lab board.

AI automation AlbertaAI consulting Albertaprivate AI security
FrontierCode 1.1 MainSWE-2 50.0% vs Fable 5.1 50.9%. Cognition says 64% cheaper.
DeepSWE 1.1SWE-2 73.0% (Cognition table).
Terminal-Bench 2.1SWE-2 92.8% (Cognition table).
Terminal-Bench 4SWE-2 27.3% vs Fable 55.8% and Astra 57.9%.
Base modelKimi K3, 2.8T parameters. Cognition RL on top.
AvailabilityDevin Desktop + CLI today. Web + Fusion rolling. No API/weights in the post.

What Cognition published

The primary is Cognition’s own blog. SWE-2 is described as the closest Cognition model yet to the frontier on cost–performance: it beats SWE-1.7 and Grok 4.6 on both score and cost on FrontierCode 1.1 Main and DeepSWE 1.1, matches GPT-5.6 Sol and Fable 5/5.1 at a fraction of their price (Cognition’s framing), and comes within a few points of GPT-6 Astra at a quarter of the cost (again, Cognition’s framing).

“Today we’re introducing SWE-2, our most advanced coding model yet. It pushes the Pareto frontier of capability and cost, achieving 50.0% on FrontierCode 1.1 Main, within one point of Fable 5.1 while being 64% cheaper.”Cognition Team, Introducing SWE-2, September 10, 2026

Versus SWE-1.7, Cognition reports efficiency gains on FrontierCode 1.1 Main: SWE-2 medium scores higher while taking 58% fewer turns and costing 81% less on average. First real edit after a median of 18 steps for SWE-2 medium versus 48 for SWE-1.7. Those are vendor trajectory metrics, not a third-party audit.

The Cognition scoreboard

Read the table as Cognition’s published comparison, not as an The Super Intelligence Times re-run. Terminal-Bench 4 is the honest gap line: SWE-2 at 27.3% sits well below Fable 5.1 (55.8%) and GPT-6 Astra (57.9%) on that harder terminal suite.

Cognition blog table, Sep 10 2026. Label as Cognition numbers.
BenchmarkSWE-2CompareNotes
FrontierCode 1.1 Main50.0%Fable 5.1 50.9%Cognition: 64% cheaper than Fable
DeepSWE 1.173.0%Astra 74.1%Cognition table
Terminal-Bench 2.192.8%Fable 91.4%Cognition table
Terminal-Bench 427.3%Fable 55.8% / Astra 57.9%Clear gap on harder terminal tasks

What Alberta operators should do

Alberta work here means AI automation Alberta, AI consulting Alberta, and private AI security. SWE-2 arrives as a Devin product surface—Desktop and CLI now, Web and Fusion rolling—not as a downloadable weight pack or a public API in this post. Treat it as a hosted coding-agent option you evaluate against task fit, retention, and data path.

Run a synthetic agent job on a dummy repo first. Fake names. No tenders, client credentials, or regulated files. If the work would hurt if it left Alberta, it does not belong in a foreign coding agent until the data boundary is written. That is the private AI security test, and it is also the AI consulting filter: score the workflow, do not paste the inbox.

The guardrail

A 50.0% FrontierCode card and a 64% cheaper claim do not put inference in Alberta, and they do not authorize shipping regulated client code offshore. For AI automation Alberta work, use Devin SWE-2 when the job fits a hosted coding agent and the contract allows it. Keep sensitive workloads on a private agents path with human approval. No API and no weights in the Cognition post means you are buying product access, not a local model you can lock down yourself.

Opcelerate recommendationTreat Cognition SWE-2 as a Devin Desktop/CLI coding-agent release with Cognition-reported benches (FrontierCode 50.0%, DeepSWE 73.0%, TB 2.1 92.8%, TB 4 27.3%). Label every score as a Cognition number. Note the Terminal-Bench 4 gap versus Fable and Astra. Confirm Web/Fusion rollout status in-product. Foreign hosted agent ≠ private/on-prem; for regulated Alberta data prefer private agents and the Opcelerate security path.