{"id":"spark-x2-6-4b","slug":"spark-x2-6-4b","name":"Spark-X2.6-4B","orgId":"iflytek","family":"spark-x2-6-4b","releaseDate":null,"availability":"announced","openWeights":true,"license":null,"paramsTotal":4000000000,"paramsSource":"slug","contextWindow":null,"knowledgeCutoff":null,"modelCardUrl":"https://dev.to/sparkllm/spark-x26-4b-stronger-on-device-agents-coding-and-controllable-thinking-2fh","hfRepo":null,"modalities":["text"],"aliases":["Spark-X2.6-4B","spark-x2.6-4b","spark x2.6 4b","spark-x2.6","spark x2.6","xhtoken/spark-x2.6-4b","sparkllm spark-x2.6-4b","iflytek spark-x2.6-4b"],"aliasNote":null,"origin":"tracked","tracked":{"trackedSince":"2026-10-21","announced":"2026-10-20","blurb":"iFlytek SparkLLM's compact open model for on-device agents. It keeps Spark-X2.5-4B's hybrid attention design (one full-attention layer per three sliding-window layers) with a 1M-token context, and adds new post-training plus a three-level thinking budget (none, low, high). Apache 2.0, with Base, FP8, INT8, INT4 and GGUF releases.","api":"none","openWeights":"yes","params":{"text":"About 4.1B","source":"Hugging Face safetensors metadata"},"facts":[{"label":"Lab","value":"SparkLLM team at iFlytek (Hugging Face org XHToken)"},{"label":"Context","value":"1,048,576 tokens"},{"label":"Thinking","value":"Three thinking levels: none, low and high"},{"label":"Lineage","value":"Same architecture as Spark-X2.5-4B (released Sep 1, 2026); gains come from new post-training"},{"label":"Checkpoints","value":"Instruct and Base, plus official FP8, INT8, INT4 and GGUF builds"},{"label":"License","value":"Apache 2.0"},{"label":"Runtimes","value":"Transformers, SGLang, vLLM, llama.cpp, Ollama, MLX and LM Studio"}],"claims":["Lab claim: 63.3 average on SparkLLM's reported suite (thinking set to high), against 52.1 for Spark-X2.5-4B and 49.1 for Qwen3.5-9B. The suite includes two in-house benchmarks, SWebBench and PAgentBench.","Lab claim: state of the art among similarly sized open models, matching or beating some ~9B models."],"sources":[{"kind":"lab","title":"SparkLLM release post (DEV Community)","url":"https://dev.to/sparkllm/spark-x26-4b-stronger-on-device-agents-coding-and-controllable-thinking-2fh","date":"2026-10-20"},{"kind":"repo","title":"Spark-X2.6-4B on Hugging Face","url":"https://huggingface.co/XHToken/Spark-X2.6-4B","date":"2026-10-20"},{"kind":"press","title":"ModelScope announcement on X","url":"https://x.com/ModelScope2022/status/2112781153065165291","date":"2026-10-21"}],"firstBenchmark":null},"organization":{"id":"iflytek","name":"iFlytek","slug":"iflytek","country":null,"url":"https://huggingface.co/XHToken","color":"#11110F","mark":"I"},"price":null,"answer":{"word":"Pending benchmarks.","scope":"Announced Oct 20, 2026; no independent results yet.","lead":"As of Oct 22, 2026, Spark-X2.6-4B is pending benchmarks on isitsota: announced Oct 20, 2026, with no independent results on the boards we track yet.","confidence":"low"},"status":"PENDING_BENCHMARKS","verdicts":[]}