Doubao 1.5 Lite (32k context) β cost-efficient ByteDance chat model for high-volume routine tasks.
Doubao-1.5-lite-32k is the lightweight, cost-optimized member of ByteDance's Doubao 1.5 model family, launched January 22, 2025 on Volcano Engine. It targets high-volume, latency-sensitive workloads where strong responsiveness and low unit cost matter more than frontier reasoning depth. The 1.5 Lite inherits the sparse MoE architecture and independent data-production pipeline used across the 1.5 series, delivering competitive lightweight performance at roughly one-third the price of Doubao-1.5-pro-32k.
For TheRouter operators, Doubao-1.5-lite-32k is the default low-cost Chinese-language chat endpoint when traffic volume is high and per-token spend must stay minimal. It supports the same OpenAI-compatible parameter surface (temperature, top_p, tools, response_format, stop) as the rest of the Doubao family, making it a drop-in routing target for cost-tiering strategies alongside the heavier 1.5-pro and Seed-series models.
| Type | Rate |
|---|---|
| Input | $0.0486 / 1M tokens |
| Output | $0.0972 / 1M tokens |
| Release date | 2025-01-22 (Doubao 1.5 family)www.aibase.com β | verified |
| Architecture | Sparse MoE (same family as 1.5-pro)seed.bytedance.com β | verified |
| License | Proprietary (API only) | verified |
| Training cutoff | Not publicly disclosed | unknown |
| Data independence | No synthetic data from other models used in trainingwww.aibase.com β | verified |
Use the global api.therouter.ai endpoint shown below for new integrations; the legacy China accelerated endpoint is retired.
curl https://api.therouter.ai/v1/chat/completions -H "Content-Type: application/json" -H "Authorization: Bearer $THE_ROUTER_API_KEY" -d '{
"model": "doubao/doubao-1-5-lite-32k",
"messages": [
{"role": "user", "content": "Summarize the key points from this input."}
]
}'curl https://api.therouter.ai/v1/chat/completions \
-H "Authorization: Bearer $THEROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"doubao/doubao-1-5-lite-32k","messages":[{"role":"user","content":"δ½ ε₯½οΌθ―·η¨δΈζδ»η»θͺε·±γ"}]}'Volcano Engine launched the full Doubao 1.5 series (Pro, Lite, Vision-Pro) on January 22, 2025. The Lite variant targets high-volume, cost-sensitive workloads while maintaining performance parity with the prior Pro-32k generation. All models share the same sparse-MoE backbone and independent data-production pipeline that avoids synthetic data from other LLMs.
| source | URL | retrieved | |
|---|---|---|---|
| Release date | www.aibase.com β | 2026-05-25 | verified |
| Architecture | seed.bytedance.com β | 2026-05-25 | verified |
| License | β | β | verified |
| Training cutoff | β | β | unknown |
| Data independence | www.aibase.com β | 2026-05-25 | verified |
| ByteDance releases Doubao Model 1.5 family β "more features, same price" | aibase.com β | 2026-05-25 | verified |