Spark-X2.6-1.7B ships: half the size of the 4B, nearly matching it on SWE Verified and τ²-bench
KokaOP · reddit · 2026-10-27
Spark-X2.6-1.7B is out: with less than half the parameters of its 4B sibling, it scores 59.8 vs 62.8 on SWE Verified and 85.3 vs 86.9 on τ²-bench, both at high thinking. The full leaderboard shows the 1.7B dominating same-size rivals (Qwen3.5-2B, Gemma4-E2B, MiniCPM5-2B, LFM2.5-2.6B) across agent benchmarks (BFCL-V4 55.2, SWebBench 53.9, BrowseComp 41.7), coding (SWE Pro 26.7) and math, with a 49.6 average. Weights are live on Hugging Face.
Related event: iFlytek Open-Sources Spark-X2.6-1.7B with 1M Context(3 posts)→
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