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Model comparison

Llama-3.1-8B-Instruct vs Qwen3.7 Flash

Llama-3.1-8B-Instruct (Meta) and Qwen3.7 Flash (Qwen) side by side: what each costs per million tokens through Rapid Router, how much context each takes, what each supports, and where independent benchmarks place them. Same API, same key; switching is a one-string change.

Llama-3.1-8B-InstructQwen3.7 Flash
Input price per 1M$0.020$0.030
Output price per 1M$0.040$0.130
Context window131K tokens1M tokens
Max output118K tokens131K tokens
Input typestexttext, image, video
Capabilitiestools, JSONtools, JSON, vision, reasoning
AuthorMetaQwen

What a month costs on each

WorkloadLlama-3.1-8B-InstructQwen3.7 Flash
Chatbot month (15M in, 4M out)$0.460$0.970
RAG month (40M in, 3M out)$0.920$1.59
Coding month (60M in, 10M out)$1.60$3.10

On a typical 75/25 input-output mix, Llama-3.1-8B-Instruct costs less (about 55% less than Qwen3.7 Flash). Qwen3.7 Flash takes the longer prompt at 1M tokens. Try your own numbers in the cost calculator.

Call either one

curl https://rapidrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $RAPIDROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "meta-llama/meta-llama-3.1-8b-instruct:free", "messages": [{"role": "user", "content": "Hello"}]}'

# the other one: change the model string
  -d '{"model": "qwen/qwen3.7-flash:free", ...}'

Common questions

Which is cheaper, Llama-3.1-8B-Instruct or Qwen3.7 Flash?

Llama-3.1-8B-Instruct is cheaper on a typical mix of 75% input and 25% output tokens, by about 55%. Through Rapid Router both are billed at the provider list price per million tokens.

Which has the larger context window?

Qwen3.7 Flash, at 1M tokens. Llama-3.1-8B-Instruct offers 131K tokens.

Can I switch between Llama-3.1-8B-Instruct and Qwen3.7 Flash without changing code?

Yes. Both are callable at https://rapidrouter.ai/api/v1 with the same OpenAI-compatible request; only the model string changes (meta-llama/meta-llama-3.1-8b-instruct:free or qwen/qwen3.7-flash:free).

How do I pay for Llama-3.1-8B-Instruct or Qwen3.7 Flash?

Top up a Rapid Router balance by card in US dollars, and both models debit that balance per request.

More Llama models: Meta API pricing · More Qwen: Qwen API pricing