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GPT-5.1

OpenAI's 2025 enhanced flagship model with comprehensive upgrades in reasoning, code, creative writing, and caching support

Category Text Model ID gpt-5.1
Context Length256K tokens
Model TypeLarge Language Model (LLM)
MultimodalSupports text, image, audio input

ๅฎšไปทไธŽ่ง„ๆ ผ

๐Ÿ’ฐ ๅฎšไปท

่พ“ๅ…ฅ$1.25 / M tokens
่พ“ๅ‡บ$10 / M tokens

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Context Length256K tokens
Model TypeLarge Language Model (LLM)
MultimodalSupports text, image, audio input
Key FeaturesReasoning, Code, Creative Writing, Multimodal Understanding
Caching SupportSupports Prompt Caching Acceleration
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",
    messages=[
        {"role": "user", "content": "Explain the basic principles of quantum computing"}
    ]
)

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",
    "messages": [
      {"role": "user", "content": "Explain the basic principles of quantum computing"}
    ]
  }'

Developer Assist

# Configure ~/.codex/config.toml
cat > ~/.codex/config.toml << 'EOF'
model_provider = "xai"
model = "gpt-5.1"
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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