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DeepSeek
DeepSeek V4 Flash 0731 is a sparse mixture-of-experts model from DeepSeek, with 13B active parameters out of 284B total. This re-post-trained revision is suited for coding, reasoning, and agent workflows....
Available via OpenRouter: create a free account at openrouter.ai, generate an API key, then call this model as deepseek/deepseek-v4-flash-0731:free through the OpenRouter API (or any OpenRouter-compatible app/client).
Grab a key at openrouter.ai/keys and call the model with its ID deepseek/deepseek-v4-flash-0731:free:
curl https://openrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $OPENROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "deepseek/deepseek-v4-flash-0731:free",
"messages": [{"role": "user", "content": "Hello!"}]
}'Verified free entry points — terms change.
Dozens of models listed at $0 for both input and output tokens — rate-limited but genuinely free. Any OpenRouter-compatible client works.
Verified 2026-09 · terms may change
Free-of-charge tier for the Gemini API with generous per-minute quotas — a card is required for billing identity, but the free quota isn't billed.
Verified 2026-09 · terms may change
Free tier on GroqCloud for Llama, Mixtral and other open models at very high tokens/second — great for prototyping agents and chat apps.
Verified 2026-09 · terms may change
Experiment plan lets you try Mistral models via API for free within a small usage envelope before committing to a paid plan.
Verified 2026-09 · terms may change
Free API access to GPT, Llama, Mistral and more for GitHub users within daily rate limits, straight from your GitHub account.
Verified 2026-09 · terms may change
Free tier for extremely fast inference of open models — useful when latency, not cost, is your bottleneck.
Verified 2026-09 · terms may change
Official: openrouter.ai/deepseek/deepseek-v4-flash-0731:fr