Dual-mode API: OpenAI-compatible chat completions and Anthropic-native messages behind one key. Use public model IDs; OVTH handles routing, retries, and compatibility at the gateway boundary.
# OpenAI-compatible
curl https://gateway.ovth.dev/v1/chat/completions \\
-H "Authorization: Bearer ***" \\
-H "Content-Type: application/json" \\
-d '{
"model": "gpt-5.5",
"messages": [{"role":"user","content":"hi"}]
}' Frontier reasoning + multimodal.
Daily-driver coding and research.
Low-latency, low-cost throughput.
Community/open-weight lane.
| model | class | context | input / output · credits / 1M | flags |
|---|---|---|---|---|
| gpt-5.5 | flagship | 1.05M | 200 / 600 | reasoning · vision |
| claude-opus-4.7 | flagship | 200K | 600 / 3000 | reasoning · vision |
| gemini-3.1-pro | flagship | 1.05M | 140 / 420 | reasoning · vision |
| grok-4.3 | flagship | 256K | 120 / 600 | reasoning |
| gpt-5.3-codex | flagship | 400K | 200 / 600 | reasoning · vision |
| claude-sonnet-4.6 | mid | 1M | 120 / 600 | reasoning · vision |
| deepseek-v4-pro | mid | 164K | 60 / 200 | reasoning |
| kimi-k2.6 | mid | 262K | 60 / 200 | reasoning · vision |
| minimax-m2.7 | mid | 1M | 60 / 200 | reasoning |
| qwen3.5-397b-a17b | mid | 262K | 40 / 160 | reasoning · vision |
| glm-5.1 | mid | 200K | 40 / 160 | reasoning |
| claude-haiku-4.5 | fast | 200K | 40 / 200 | reasoning · vision |
| gpt-5.4-mini | fast | 400K | 16 / 64 | reasoning · vision |
| deepseek-v4-flash | fast | 164K | 10 / 40 | reasoning |
| gemini-3-flash | fast | 1.05M | 6 / 24 | reasoning · vision |
| mimo-v2-flash | fast | 200K | 6 / 24 | reasoning |
| gemma-4-31b-it | open | 131K | 0 / 0 | vision |
| gpt-oss-120b | open | 131K | 0 / 0 | reasoning |
Credit costs are shown per 1M input/output tokens. Capability flags reflect the public API surface; provider routing details are intentionally not exposed.
Point OpenAI-compatible clients at /v1/chat/completions, or Claude/Anthropic clients at /v1/messages. Pick your model by public id; no provider keys or backend configuration are exposed to clients.
# Anthropic-native Messages API
curl https://gateway.ovth.dev/v1/messages \\
-H "Authorization: Bearer ***" \\
-H "anthropic-version: 2023-06-01" \\
-H "Content-Type: application/json" \\
-d '{
"model": "claude-sonnet-4.6",
"max_tokens": 1024,
"messages": [{"role":"user","content":"hi"}]
}' # reasoning / thinking
curl https://gateway.ovth.dev/v1/chat/completions \\
-H "Authorization: Bearer ***" \\
-H "Content-Type: application/json" \\
-d '{
"model": "claude-sonnet-4.6",
"max_tokens": 1024,
"reasoning_effort": "medium",
"messages": [{"role":"user","content":"explain monads"}]
}' # vision · upload or public URL
curl https://gateway.ovth.dev/v1/chat/completions \
-H "Authorization: Bearer *** \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5.5",
"messages": [{
"role": "user",
"content": [
{"type":"text","text":"describe this image"},
{"type":"image_url","image_url":{"url":"https://example.com/image.png"}}
]
}]
}' Uploads can be sent as base64/data URLs. Public image URLs work too when reachable from the gateway.
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