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GPT-5.1 Codex Mini

OpenAI's 2025 lightweight code model, offering faster response times and lower costs while maintaining high-quality code capabilities

Category Text Model ID gpt-5.1-codex-mini
Context Length256K tokens
Model TypeLightweight Code Model
Key FeaturesFast Code Generation, Code Completion

ๅฎšไปทไธŽ่ง„ๆ ผ

๐Ÿ’ฐ ๅฎšไปท

่พ“ๅ…ฅ$0.375 / M tokens
่พ“ๅ‡บ$3 / M tokens

โš™๏ธ ่ง„ๆ ผ

Context Length256K tokens
Model TypeLightweight Code Model
Key FeaturesFast Code Generation, Code Completion
Caching SupportSupports Prompt Caching Acceleration
Response SpeedOptimized Latency
Knowledge CutoffJune 2025
API CompatibilityOpenAI API, Codex CLI

API ่ฐƒ็”จ็คบไพ‹

Python (OpenAI SDK)

from openai import OpenAI

client = OpenAI(
    api_key="your-api-key",
    base_url="https://api.xairouter.com/v1"
)

response = client.chat.completions.create(
    model="gpt-5.1-codex-mini",
    messages=[
        {"role": "user", "content": "Write a quicksort function in Python"}
    ]
)

print(response.choices[0].message.content)

cURL (OpenAI API)

curl https://api.xairouter.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "gpt-5.1-codex-mini",
    "messages": [
      {"role": "user", "content": "Write a quicksort function in Python"}
    ]
  }'

Developer Assist

# Configure ~/.codex/config.toml
cat > ~/.codex/config.toml << 'EOF'
model_provider = "xai"
model = "gpt-5.1-codex-mini"
model_reasoning_effort = "high"
model_reasoning_summary = "detailed"
approval_policy = "never"
sandbox_mode = "danger-full-access"
network_access = true
preferred_auth_method = "apikey"

[shell_environment_policy]
inherit = "all"
ignore_default_excludes = false

[model_providers.xai]
name = "xai"
base_url = "https://api.xairouter.com"
wire_api = "responses"
requires_openai_auth = true
env_key = "OPENAI_API_KEY"

[tools]
web_search = true
EOF

# Configure ~/.codex/auth.json
cat > ~/.codex/auth.json << 'EOF'
{
  "OPENAI_API_KEY": "sk-Xvs..."
}
EOF

# Launch Codex CLI
codex
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