Qwen: Qwen3 8B✓ Catalog verified
Qwen3-8B is a dense 8.2B parameter causal language model from the Qwen3 series, designed for both reasoning-heavy tasks and efficient dialogue. It supports seamless switching between "thinking" mode for math, coding, and logical inference, and "non-thinking" mode for general conversation. The model is fine-tuned for instruction-following, agent integration, creative writing, and multilingual use across 100+ languages and dialects. It natively supports a 32K token context window and can extend to 131K tokens with YaRN scaling.
Overview
Qwen3-8B is a dense 8.2B parameter causal language model from the Qwen3 series, designed for both reasoning-heavy tasks and efficient dialogue. It supports seamless switching between "thinking" mode for math, coding, and logical inference, and "non-thinking" mode for general conversation. The model is fine-tuned for instruction-following, agent integration, creative writing, and multilingual use across 100+ languages and dialects. It natively supports a 32K token context window and can extend to 131K tokens with YaRN scaling.
Access: available through the official Qwen API. Context window: 41K.
Specifications
| API identifier | qwen/qwen3-8b |
| Provider | Qwen |
| Model type | Text LLM |
| Context window | 41K catalog |
| Input modalities | text |
| Output modalities | text |
| Released | Apr 28, 2025 |
| Tokenizer | Qwen3 |
| Instruction format | qwen3 |
| Moderated | No |
| Architecture modality | text->text |
API defaults
{
"top_k": 20,
"top_p": 0.95,
"temperature": 0.6,
"presence_penalty": null,
"frequency_penalty": null,
"repetition_penalty": null
}Pricing
Live pricing components for qwen/qwen3-8b as published in the catalog.
| Pricing component | Raw unit price | Normalized | Unit |
|---|---|---|---|
| Prompt tokens | $5e-8 | $0.05 / 1M | Per input token |
| Completion tokens | $4e-7 | $0.40 / 1M | Per output token |
| Request fee | N/A | N/A | Per request |
| Image fee | N/A | N/A | Per image unit |
| Web search fee | N/A | N/A | Per search request |
Cost calculator
Estimate monthly spend from your own token volumes.
Estimated Total Cost
$0.11Calculated from current list pricing in the ModelsAtlas catalog.Capabilities
| Capability | Status | What it means |
|---|---|---|
| Visual Understanding | Not advertised | Image and document analysis support |
| Audio Processing | Not advertised | Speech and voice aligned flows |
| Tool Calling | ✓ Supported | Supports tools / function calling |
| Self-Hosting | ✓ Supported | Deploy outside managed APIs |
Capability signals
Directional signals derived from model metadata and capability tags — not official benchmark submissions.
Quick start
Call Qwen: Qwen3 8B through an OpenAI-compatible client.
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key="YOUR_API_KEY"
)
response = client.chat.completions.create(
model="qwen/qwen3-8b",
messages=[{"role": "user", "content": "Explain quantum physics."}]
)
print(response.choices[0].message.content)Alternatives
Closest models by context window from a different provider.
| Model | Provider | Context | Input /1M | Actions |
|---|---|---|---|---|
| AllenAI: Molmo2 8B | Allenai | 37K | $0.20 | View → |
| AionLabs: Aion-RP 1.0 (8B) | Aion Labs | 33K | $0.80 | View → |
Sources & attribution
Pricing and metadata are maintained in the ModelsAtlas catalog.
Frequently asked questions
How much does Qwen: Qwen3 8B cost?
$0.05 per 1M input tokens and $0.40 per 1M output tokens on the official Qwen API.
What is the context window of Qwen: Qwen3 8B?
Qwen: Qwen3 8B supports up to 41K tokens of context.
Does Qwen: Qwen3 8B support tool / function calling?
Yes, Qwen: Qwen3 8B supports tool / function calling — you can register tools and the model will emit structured tool calls.
How do I access Qwen: Qwen3 8B?
Use the official Qwen API with the model id `qwen/qwen3-8b`. See the Quick start section above for code examples.