OpenAI Assistants Alternative

RAG without the Assistants tax.

OpenAI's Assistants API charges per assistant, per message, per GB-day, plus the model cost. Lexora gives you knowledge bases for free — you pay only for inference.

Free knowledge bases

No per-assistant fee. No GB-day storage fee. Free 1 KB / 15 MB on PAYG, 10 KBs / 50 MB on Pro.

Bring any model

Assistants locks you to GPT-4o. Lexora lets you mix Qwen3, DeepSeek, Kimi, FLUX — same KB, swap models per call.

Citations, page-level

Every answer includes file name + page number. Assistants returns citations inconsistently; Lexora returns them always.

OpenAI-compatible chat

Use the standard /v1/chat/completions endpoint — pass kb_id in the body. No new SDK, no new abstractions.

Lexora vs OpenAI Assistants

Side-by-side breakdown of what matters.

Feature
Lexora
OpenAI Assistants
Storage cost
Free up to plan limit
$0.10 / GB-day
Per-assistant fee
$0
Per-call charges
Model choice
Qwen, DeepSeek, Kimi, FLUX
OpenAI only
Citations
Always (page-level)
Inconsistent
API surface
Standard chat completions
Assistants v2 — custom
Streaming
SSE token streaming
Yes

Cancel the Assistants subscription.

Move your RAG workload to a platform that doesn't charge you to store the documents you're going to query anyway.

Related

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