Surpassing Frontier Performance with Open Source Synth at 1/3 the price

TrustedRouter presents Synth as a multi-model research system in which several models independently gather and report information, a judge evaluates their outputs, and a synthesizer produces the final answer. Its reported DRACO benchmark results indicate that an all-open-weight panel using MiniMax M3, Kimi K2.6, DeepSeek V4 Pro, Gemma-4, and GLM-5.2, with Kimi K2.6 as judge and GLM-5.2 as synthesizer, scored 69.2 at an estimated cost of about $80 per 100 tasks, compared with 65.3 and roughly $250 for Fable 5 alone. A mixed frontier-model panel reportedly achieved 73.4, while a Fable 5 plus GPT-5.5 configuration scored 69.0, though the company notes that several competing cost figures are modeled rather than directly billed. The proposed advantage of the panel approach is that independently trained models may make different errors, enabling the judge and synthesizer to retain claims supported across reports. The account also identifies GLM-5.2’s occasional refusals on politically sensitive prompts as a limitation and describes an open-weight fallback, such as Gemma-4, to continue responses when this occurs. TrustedRouter emphasizes that the models, routing approach, code, and benchmark harness are publicly available and that an all-open system can be run on user-owned hardware without relying on proprietary APIs.

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