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AI21 LabsvsRouterPlus

AI21 Labs vs RouterPlus: Token Pricing, Speed & Intelligence

Full comparison of AI21 Labs and RouterPlus — live token pricing, latency, throughput, context window, strengths, weaknesses, and best use cases. Rates sourced from public APIs — verify before use.

AI21 Labs

Jamba 1.6 — hybrid SSM-Transformer models with 256K context

AI21 Labs develops the Jamba model family, which uses a hybrid SSM (Mamba) and Transformer architecture. Jamba 1.6 Large and Mini offer 256K token context windows at competitive prices. The hybrid architecture delivers faster inference and lower memory usage than pure-Transformer models of comparable size.

Long-context chatDocument analysisSummarisationCost-sensitive inference
Proprietary models

RouterPlus

API router / marketplace — 117 text models with per-route pricing

RouterPlus is an API router and marketplace offering access to 117+ text models. Prices shown are the published base catalog rates — actual price depends on the selected route and context, and is not a guaranteed bill. RouterPlus provides per-route pricing transparency with 27 models having numerically different route prices.

Multi-model accessRoute-level cost transparencyModel comparisonPrototyping
Open-weight hostHosts open weights

Key metric comparison

AI21 Labs
RouterPlus
Cheapest input ($/1M)

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Cheapest output ($/1M)

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Peak throughput

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Best latency (TTFT)

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Intelligence score

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Context window

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Live token pricing

Strengths and weaknesses

AI21 Labs

Hybrid SSM-Transformer architecture delivers faster inference than pure-Transformer models
256K token context window on both Jamba 1.6 Large and Mini
Jamba 1.6 Mini at $0.20/$0.40 per 1M tokens is highly cost-competitive
Strong performance on long-document tasks due to SSM efficiency
Smaller model family than frontier labs — two models vs dozens at OpenAI or Anthropic
Less ecosystem support than OpenAI-compatible providers
No image, audio, or multimodal models

RouterPlus

Wide catalog: 117 text models including Claude, GPT, Gemini, Grok, Kimi, GLM, Qwen, Mistral, and more
Per-route pricing transparency — see actual route prices, not just a blended rate
OpenAI-compatible API at api.routerplus.com/v1
Includes open-weight models (Llama, Gemma, Qwen, Nemotron)
Catalog rate is not a guaranteed bill — actual price depends on selected route and context
API router/marketplace — not a direct compute provider
27 models have numerically different route prices; check route details before production use

Key differentiators

AI21 Labs

Jamba's hybrid SSM-Transformer architecture enables 256K context at lower memory and latency cost than pure-Transformer models — with Jamba 1.6 Mini among the cheapest 256K-context options available.

RouterPlus

An API router with 117 text models and per-route pricing transparency — the catalog rate is a published base rate, not a guaranteed bill; actual price depends on selected route and context.

Frequently asked questions

AI21 Labs FAQs

What is the Jamba architecture?

Jamba uses a hybrid of Mamba (SSM) and Transformer layers. This reduces memory usage and improves throughput on long sequences compared to pure-Transformer models, while maintaining strong reasoning performance.

How much does AI21 Labs API cost?

Jamba 1.6 Large is $2.00/$8.00 per 1M input/output tokens. Jamba 1.6 Mini is $0.20/$0.40 per 1M tokens. Both support 256K context. See ai21.com/pricing for current rates.

What context window does Jamba 1.6 support?

Both Jamba 1.6 Large and Jamba 1.6 Mini support 256K token context windows, making them suitable for long-document analysis and extended conversations.

RouterPlus FAQs

Are RouterPlus prices guaranteed?

No. RouterPlus prices shown are published base catalog rates. Actual price depends on the selected route and context. 27 models have numerically different route prices. Check route details before production use.

What models does RouterPlus offer?

RouterPlus offers 117 text models including Claude 5 (Fable 5.1, Opus 5-5, Sonnet 5-5, Haiku 5-5), GPT-6 Astra, Gemini 3.x, Grok 4.x, Kimi K3, GLM-5.3, Qwen 3.8 Max, DeepSeek V4 Pro, Mistral Large 4, and many more. See the model table for current rates.

What is the RouterPlus API base URL?

The RouterPlus API base is https://api.routerplus.com/v1 with OpenAI-compatible endpoints. See https://app.routerplus.com/docs/models for full documentation.

Provider resources

AI21 Labs

Provider page
Website
PricingDocs

RouterPlus

Provider page
Website
PricingDocs

AI21 Labs — Jamba 1.6 — hybrid SSM-Transformer models with 256K context

AI21 Labs develops the Jamba model family, which uses a hybrid SSM (Mamba) and Transformer architecture. Jamba 1.6 Large and Mini offer 256K token context windows at competitive prices. The hybrid architecture delivers faster inference and lower memory usage than pure-Transformer models of comparable size.

Jamba's hybrid SSM-Transformer architecture enables 256K context at lower memory and latency cost than pure-Transformer models — with Jamba 1.6 Mini among the cheapest 256K-context options available.

RouterPlus — API router / marketplace — 117 text models with per-route pricing

RouterPlus is an API router and marketplace offering access to 117+ text models. Prices shown are the published base catalog rates — actual price depends on the selected route and context, and is not a guaranteed bill. RouterPlus provides per-route pricing transparency with 27 models having numerically different route prices.

An API router with 117 text models and per-route pricing transparency — the catalog rate is a published base rate, not a guaranteed bill; actual price depends on selected route and context.

Key strengths compared

AI21 Labs

  • Hybrid SSM-Transformer architecture delivers faster inference than pure-Transformer models
  • 256K token context window on both Jamba 1.6 Large and Mini
  • Jamba 1.6 Mini at $0.20/$0.40 per 1M tokens is highly cost-competitive
  • Smaller model family than frontier labs — two models vs dozens at OpenAI or Anthropic
  • Less ecosystem support than OpenAI-compatible providers

RouterPlus

  • Wide catalog: 117 text models including Claude, GPT, Gemini, Grok, Kimi, GLM, Qwen, Mistral, and more
  • Per-route pricing transparency — see actual route prices, not just a blended rate
  • OpenAI-compatible API at api.routerplus.com/v1
  • Catalog rate is not a guaranteed bill — actual price depends on selected route and context
  • API router/marketplace — not a direct compute provider

Key weaknesses compared

AI21 Labs

  • Smaller model family than frontier labs — two models vs dozens at OpenAI or Anthropic
  • Less ecosystem support than OpenAI-compatible providers
  • No image, audio, or multimodal models

RouterPlus

  • Catalog rate is not a guaranteed bill — actual price depends on selected route and context
  • API router/marketplace — not a direct compute provider
  • 27 models have numerically different route prices; check route details before production use

Provider category context

AI21 Labs is a frontier lab, founded in 2017. RouterPlus is a inference api. AI21 Labs as a frontier lab trains and serves its own proprietary models. RouterPlus as an inference API provider hosts open-weight models — typically offering lower prices for equivalent capability tiers but without access to proprietary frontier models.

How to choose between them

Choose AI21 Labs if you need Long-context tasks. Choose RouterPlus if you need wide catalog: 117 text models including claude, gpt, gemini, grok, kimi, glm, qwen, mistral, and more. For high-volume production workloads, run a cost comparison using the token pricing table above with your actual prompt/completion token ratio — the cheapest provider depends heavily on your input-to-output token ratio.