Spark X2.6 Models by iFLYTEK Developer
iFLYTEK Developer releases · 4 in the last 12 months · this family litChangelog →
1 model2026Up to 1M ctx
Last refreshed 2026-10-21. Next refresh: weekly.
Details
ResearcheriFLYTEK Developer
LicenseApache 2.0OSI-approved
Commercial usePermitted
Models1
Released2026
Max context1M
Capabilities
ReasoningAll models
JSON / Tool useAll models
About
Spark X2.6 is iFlytek's (SparkLLM / XHToken) October 2026 generation of compact open-weight models for on-device agents. Spark-X2.6-4B keeps the Spark-X2.5-4B architecture and gains coding, agentic, long-context and multilingual ability through improved post-training, with none/low/high thinking levels.
Decision facts
- Best fit
- agenticreasoningJSON / Tool use
- Capability starting point
- Spark X2.6 4B with 1M context and reasoning and JSON / Tool use
- Lowest tracked input
- Not tracked
- Closest related family
- Spark X2.5
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
1 in view
Spark X2.6 4BCurrent
Use when the workload needs agentic, 1M context, and 4B parameters.
2026-10agentic1M context4B parameters
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| Spark X2.6 4B | Use when the workload needs agentic, 1M context, and 4B parameters. | 2026-10 | agentic1M context4B parameters | Current |
Release Timeline
1 release group2026-10
1 current
Spark X2.6 4B
Currentagentic1M context4B parameters
Specifications(1 models)
| Model | Released | Context | Parameters | Reasoning | JSON / Tool use |
|---|---|---|---|---|---|
| Spark X2.6 4B | 2026-10 | 1M | 4B | Yes | Yes |