81Fit score
DeepSeek V4 Flash is an efficiency-optimized Mixture-of-Experts model from DeepSeek with 284B total parameters and 13B activated parameters, supporting a 1M-token context window. It is designed for fast inference and...
Model details →Best AI models for RAG
Good RAG models have long context (to fit retrieved chunks), low hallucination, and tool use for query refinement.
81Fit score
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....
Model details →81Fit score
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....
Model details →Top 25 models for retrieval-augmented generation
| # | Model | Provider | Context | Input price / 1M | Tier |
|---|---|---|---|---|---|
| 1 | DeepSeek: DeepSeek V4 Flash 0423 | DeepSeek | 1.0M Ultra context (1M+) | $0.09 | Budget |
| 2 | DeepSeek: DeepSeek V4 Flash 0731 | DeepSeek | 1.3M Ultra context (1M+) | $0.04 | Budget |
| 3 | DeepSeek: DeepSeek V4 Flash 0731 (free) | DeepSeek | 1.0M Ultra context (1M+) | $0.00 | Budget |
| 4 | Google: Gemini 2.0 Flash Lite | 1.0M Ultra context (1M+) | $0.07 | Budget | |
| 5 | Google: Gemini 2.5 Flash Lite (batch) | 1.0M Ultra context (1M+) | $0.05 | Budget | |
| 6 | MiniMax: MiniMax M3 (free) | Minimax | 1.0M Ultra context (1M+) | $0.00 | Budget |
| 7 | OpenAI: GPT-4.1 Nano (batch) | OpenAI | 1.0M Ultra context (1M+) | $0.05 | Budget |
| 8 | OpenAI: GPT-6 Luna (batch) | OpenAI | 1.1M Ultra context (1M+) | $0.05 | Budget |
| 9 | OpenAI: GPT-6 Luna Pro (batch) | OpenAI | 1.1M Ultra context (1M+) | $0.05 | Budget |
| 10 | Auto Router | Openrouter | 2M Ultra context (1M+) | $-1000000.00 | Budget |
| 11 | Auto Router (Beta) | Openrouter | 2M Ultra context (1M+) | $-1000000.00 | Budget |
| 12 | Qwen: Qwen3.5-Flash | Qwen | 1M Ultra context (1M+) | $0.07 | Budget |
| 13 | Qwen: Qwen3.6 Plus Preview (free) | Qwen | 1M Ultra context (1M+) | $0.00 | Budget |
| 14 | Qwen: Qwen3.7 Flash | Qwen | 1M Ultra context (1M+) | $0.03 | Budget |
| 15 | Ox Alpha | Stealth | 1.0M Ultra context (1M+) | $0.00 | Budget |
| 16 | Z.ai: GLM 5.3 Flash (batch) | Z Ai | 1.0M Ultra context (1M+) | $0.06 | Budget |
| 17 | ByteDance Seed: Seed 1.6 Flash | Bytedance Seed | 262K Long context (128K+) | $0.07 | Budget |
| 18 | DeepSeek: DeepSeek V4 Flash 0731 (batch) | DeepSeek | 1.0M Ultra context (1M+) | $0.11 | Budget |
| 19 | DeepSeek: DeepSeek V4 Flash Vision Exp | DeepSeek | 1.0M Ultra context (1M+) | $0.22 | Budget |
| 20 | DeepSeek: DeepSeek V4 Flash Vision Exp (batch) | DeepSeek | 1.0M Ultra context (1M+) | $0.11 | Budget |
| 21 | DeepSeek: DeepSeek V4 Pro 0423 | DeepSeek | 1.0M Ultra context (1M+) | $0.96 | Budget |
| 22 | DeepSeek: DeepSeek V4 Pro 0813 (batch) | DeepSeek | 1.0M Ultra context (1M+) | $0.66 | Budget |
| 23 | DeepSeek: DeepSeek V4.1 Flash | DeepSeek | 1.0M Ultra context (1M+) | $0.10 | Budget |
| 24 | DeepSeek: DeepSeek V4.1 Flash (batch) | DeepSeek | 1.0M Ultra context (1M+) | $0.11 | Budget |
| 25 | Dots Studio: Dots3-Note Preview (free) | Dots Studio | 512K Long context (128K+) | $0.00 | Budget |
Frequently asked questions
How big should the context window be for RAG?
32K is a comfortable minimum for typical knowledge-base RAG. 128K+ lets you include large source documents without summarization. 1M+ enables 'cache the whole codebase' patterns.
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