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Reasoning Level
Default
Balanced reasoning. Good for most tasks.
Low
Minimal reasoning. Fastest, best for simple Q&A.
Medium
Moderate depth. Good balance of speed and quality.
High
Deep reasoning. Best for complex code & math.
Rapid
Quick structured thinking. Speed over depth.
Max
Maximum effort. Slowest, highest quality.
Select Model
0
Normal.
00
Fast
Fastest.
000
Rapid
Highest. Fast
V
Smart. Uncensored.
VV
Beta
Coding. Smartest.
VVV
Einstein
Smartest.
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Void V1 Flash
A high-capacity Mixture-of-Experts (MoE) reasoning model designed for large-scale, high-complexity tasks, with 1 trillion total parameters and 50 billion active parameters per forward pass to enable efficient inference. It is optimized for advanced reasoning, code generation, long-horizon planning, and complex agentic workflows, and supports an extended context window of up to 1 million tokens, allowing coherent understanding and generation across extensive documents, large codebases, and multi-step interactions.
SWE-Bench Verified 88.9%
Terminal-Bench 2.0 70.1%
AIME 2025 93.0%
GPQA Diamond 90.0%
MMLU-Pro 94.7%
GSM8K 99.2%
HumanEval 98.8%
MBPP 97.9%
BBH 95.6%
ARC-Challenge 96.1%
HellaSwag 97.4%
Long Context (1M) 82.0%
Needle Retrieval 99.5%
RULER 94.9%
AgentBench 92.8%
ToolBench 94.6%
WebArena 89.3%
MMMU 90.1%
MathVista 92.7%
ChartQA 95.8%
DocVQA 96.5%
TruthfulQA 90.8%
Hallucination Resistance 93.9%
1T
Total Params
1M
Context
50B
Active Params
voidv1-flash
Base URL0vai.vercel.app
AuthBearer token
FormatOpenAI-compatible
Streaming✓ SSE
CORS*
06 Rate Limits
This API is free and IP rate limited. Even if you use a different API key, requests are still tracked by your IP so switching keys won't reset your limit. If you get rate limited, just wait 1 hour and it resets automatically.
01 API Key
void_sk_XXXXXXXXXXXXXXXXX
Pass it as Authorization: Bearer <key>. Keep it secret.
02 Use on other apps
OpenAI-compatible, works in SillyTavern, Open WebUI, Cursor, Windsurf, etc.
Provider ID
void
Base URL
https://0vai.vercel.app/api/v1
API Key
void_sk_XXXXXXXXXXXXXXXXX
Model
voidv1-flash
Endpoint
/api/v1/chat/completions
Features: streaming · tools · response_format · reasoning
03 Endpoint
POST /api/v1/chat/completions
Field
Type
Default
messages
array
required
stream
boolean
true
tools
array
optional
tool_choice
string|object
auto
response_format
object
optional
reasoning_effort
string
medium
model is ignored, always serves voidv1-flash. reasoning_effort: low | medium | high.
Example
curl https://0vai.vercel.app/api/v1/chat/completions \
  -H "Authorization: Bearer $VOID_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"messages":[{"role":"user","content":"Hi"}],"stream":false}'
04 Errors
Status
Meaning
400
Invalid JSON or missing messages.
401
Missing or invalid API key.
403
Key lacks permission.
429
Rate limit, slow down.
500
Internal model error.
503
Model temporarily unavailable.
504
Timed out, retry or shorten prompt.
{ "error": { "message": "...", "type": "api_error", "code": 401 } }
05 Reasoning Effort & Tool Compatibility
Automatic Reasoning Difficulty Void V1 Flash exposes reasoning_effort natively via the /api/v1/models endpoint. Tools like OpenCode Zen, Claude Code, Cursor, and Windsurf automatically detect and surface a reasoning difficulty selector, no manual configuration needed.
Level
Behavior
low
Fast, minimal reasoning. Best for simple Q&A.
medium
Balanced. Recommended for most tasks.
high
Deep reasoning. Best for complex code & math.
Pass it manually
curl https://0vai.vercel.app/api/v1/chat/completions \
  -H "Authorization: Bearer $VOID_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"messages":[{"role":"user","content":"Think deeply"}],"reasoning_effort":"high","stream":false}'
Compatible tools read reasoning_effort_levels from /api/v1/models and surface a difficulty picker automatically. No extra config needed.