OpenRouter Promo Code & Free Tier

OpenRouter doesn't issue public promo codes, coupon codes, or discount codes. Sites listing "OpenRouter coupon 50% off" or "OpenRouter promo code 2026" are recycling fake codes that won't work at checkout. The real savings paths are the free tier (25+ open-weight models, 50 reqs/day), prompt cache discounts that pass through provider pricing (around 90% off cached Anthropic input tokens, 50% off OpenAI), BYOK for using your own provider keys with a small platform fee instead of full markup, and Enterprise volume discounts via OpenRouter's sales team.

Not in the form of a "$5 welcome credit" — but OpenRouter's free tier gives any signed-in user access to 25+ open-weight models (Llama, Gemma, Qwen, DeepSeek, Mistral, and others) with 50 requests per day, no credit card required. Once you add $10 in credits, the free-tier daily cap increases to 1000 requests per day, on top of the paid models that the credits unlock.

No, OpenRouter doesn't offer a dedicated student or education discount. The free tier (25+ models, 50 reqs/day) is the closest equivalent — generous for coursework, prototypes, and student-scale experimentation. For larger research workloads, contact OpenRouter's sales team about volume pricing.

Prompt caching is OpenRouter's most underrated savings lever. The discount comes from the underlying provider — Anthropic caches input tokens at around 90% off, OpenAI at around 50% off — and OpenRouter passes the savings through automatically. No code to apply. Practical tip: put long system prompts, retrieval context, and tool definitions at the start of your messages so they hit the cache across repeat requests.

OpenRouter charges no markup on inference itself — the per-token cost matches the direct provider price. They earn through a small platform fee (around 5%) on credit purchases and BYOK requests. With BYOK (Bring Your Own Key), you can use your existing OpenAI or Anthropic credits while routing through OpenRouter for logging and multi-model UI, paying only that small fee instead of full provider markup. Net: OpenRouter is roughly cost-neutral vs. going direct, with the advantage of one API across 300+ models.