Chat completions

Generate chat responses across 100+ models from one API. Drop-in compatible with OpenAI Chat Completions, Anthropic Messages, and Anthropic Responses.

Authorization: Bearer sk-air-YOUR_API_KEY
# alt for /v1/messages:
x-api-key: sk-air-YOUR_API_KEY

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer sk-air-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.1-chat",
    "messages": [
      {"role": "system", "content": "You are a helpful assistant."},
      {"role": "user", "content": "What is the capital of France?"}
    ],
    "max_tokens": 200,
    "temperature": 0.7
  }'

{
  "id": "chatcmpl-abc123",
  "object": "chat.completion",
  "created": 1710000000,
  "model": "gpt-5.1-chat",
  "choices": [{
    "index": 0,
    "message": {
      "role": "assistant",
      "content": "The capital of France is Paris."
    },
    "finish_reason": "stop"
  }],
  "usage": {
    "prompt_tokens": 20,
    "completion_tokens": 8,
    "total_tokens": 28
  }
}

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer sk-air-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "o3-mini",
    "messages": [{"role": "user", "content": "Prove the Pythagorean theorem."}],
    "reasoning_effort": "high"
  }'

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer sk-air-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4.6",
    "messages": [{"role": "user", "content": "Plan a 7-day Italy trip."}],
    "thinking": {"type": "enabled", "budget_tokens": 4000}
  }'

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer sk-air-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.1-chat",
    "messages": [{
      "role": "user",
      "content": [
        {"type": "text", "text": "What is in this image?"},
        {"type": "image_url", "image_url": {"url": "https://example.com/cat.jpg"}}
      ]
    }]
  }'

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer sk-air-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.1-chat",
    "messages": [{"role": "user", "content": "What is the weather in Paris?"}],
    "tools": [{
      "type": "function",
      "function": {
        "name": "get_weather",
        "description": "Get current weather for a location",
        "parameters": {
          "type": "object",
          "properties": {
            "location": {"type": "string", "description": "City name"}
          },
          "required": ["location"]
        }
      }
    }],
    "tool_choice": "auto"
  }'

{
  "id": "chatcmpl-abc123",
  "choices": [{
    "index": 0,
    "message": {
      "role": "assistant",
      "content": null,
      "tool_calls": [{
        "id": "call_1",
        "type": "function",
        "function": {
          "name": "get_weather",
          "arguments": "{\"location\":\"Paris\"}"
        }
      }]
    },
    "finish_reason": "tool_calls"
  }]
}

{
  "model": "gpt-5.1-chat",
  "messages": [
    {"role": "user", "content": "What is the weather in Paris?"},
    {
      "role": "assistant",
      "content": null,
      "tool_calls": [{
        "id": "call_1",
        "type": "function",
        "function": {"name": "get_weather", "arguments": "{\"location\":\"Paris\"}"}
      }]
    },
    {"role": "tool", "tool_call_id": "call_1", "content": "{\"temp_c\": 14, \"sky\": \"cloudy\"}"}
  ]
}

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer sk-air-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.1-chat",
    "messages": [{"role": "user", "content": "Write a haiku about Berlin."}],
    "stream": true,
    "stream_options": {"include_usage": true}
  }'

data: {"id":"chatcmpl-abc123","object":"chat.completion.chunk","created":1710000000,"model":"gpt-5.1-chat","choices":[{"index":0,"delta":{"role":"assistant"},"finish_reason":null}]}

data: {"id":"chatcmpl-abc123","object":"chat.completion.chunk","created":1710000000,"model":"gpt-5.1-chat","choices":[{"index":0,"delta":{"content":"Cold "},"finish_reason":null}]}

data: {"id":"chatcmpl-abc123","object":"chat.completion.chunk","created":1710000000,"model":"gpt-5.1-chat","choices":[{"index":0,"delta":{"content":"stone "},"finish_reason":null}]}

…

data: {"id":"chatcmpl-abc123","object":"chat.completion.chunk","created":1710000000,"model":"gpt-5.1-chat","choices":[{"index":0,"delta":{},"finish_reason":"stop"}],"usage":{"prompt_tokens":12,"completion_tokens":17,"total_tokens":29}}

data: [DONE]

curl https://api.airforce/v1/messages \
  -H "x-api-key: sk-air-YOUR_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4.6",
    "max_tokens": 256,
    "system": "You are a helpful assistant.",
    "messages": [
      {"role": "user", "content": "Hello, Claude!"}
    ]
  }'

event: message_start
data: {"type":"message_start","message":{"id":"msg_01","role":"assistant","content":[],"model":"claude-sonnet-4.6","stop_reason":null,"usage":{"input_tokens":12,"output_tokens":1}}}

event: content_block_start
data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}}

event: content_block_delta
data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"Hello"}}

event: content_block_stop
data: {"type":"content_block_stop","index":0}

event: message_delta
data: {"type":"message_delta","delta":{"stop_reason":"end_turn"},"usage":{"output_tokens":17}}

event: message_stop
data: {"type":"message_stop"}

{
  "model": "claude-sonnet-4.6",
  "max_tokens": 1024,
  "system": [
    {"type": "text", "text": "You are a senior staff engineer at Airforce."},
    {
      "type": "text",
      "text": "<repository-snapshot>...</repository-snapshot>",
      "cache_control": {"type": "ephemeral"}
    }
  ],
  "messages": [
    {"role": "user", "content": "Where is rate limiting enforced?"}
  ]
}

"usage": {
  "prompt_tokens": 2104,
  "completion_tokens": 147,
  "total_tokens": 2251,
  "prompt_tokens_details": { "cached_tokens": 1980 },
  "cache_creation_input_tokens": 124,
  "cache_creation": {
    "ephemeral_5m_input_tokens": 124,
    "ephemeral_1h_input_tokens": 0
  }
}

"usage": {
  "input_tokens": 2104,
  "output_tokens": 147,
  "cache_read_input_tokens": 1980,
  "cache_creation_input_tokens": 124,
  "cache_creation": {
    "ephemeral_5m_input_tokens": 124,
    "ephemeral_1h_input_tokens": 0
  }
}

"usageMetadata": {
  "promptTokenCount": 2104,
  "candidatesTokenCount": 147,
  "totalTokenCount": 2251,
  "cachedContentTokenCount": 1980
}

"cache_control": { "type": "ephemeral", "ttl": "1h" }

"usage": {
  "input_tokens": 2104,
  "output_tokens": 12,
  "cache_creation_input_tokens": 1980,
  "cache_read_input_tokens": 0
}

"usage": {
  "input_tokens": 2104,
  "output_tokens": 12,
  "cache_creation_input_tokens": 0,
  "cache_read_input_tokens": 1980
}

{
  "error": {
    "message": "Model 'gpt-99' not found.",
    "type": "invalid_request",
    "param": "model",
    "code": "model_not_found"
  }
}