Which LLM is the cheapest for our workload?

The best-for pages rank the live catalogue per task by the index that measures it, and the router picks the cheapest model that meets your quality rule for each request.

How much can we save on our LLM bill?

On the public benchmark the router saved 89% against sending everything to the reference model. Import last month's provider bill on the bill page and the estimate is computed on your own traffic before you change a line of code.

How often do model prices change?

The catalogue is refreshed from the vendors' price lists; each model page shows the date of its data.

90 days of the enterprise, pro and team plans free, no card needed. See the plans

OpenSmartRoute

Qwen3.5 Plus 2026-04-20 by Qwen: pricing, context window and specs - OpenSmartRoute

Model catalogue

Qwen

Qwen3.5 Plus 2026-04-20

qwen/qwen3.5-plus-20260420Catalogue: Indexed in the reference catalogue; nothing on this deployment answers as this model yet.

JSON

Specification

Published by the vendor; the platform bills at the target's declared price.

Qwen3.5 Plus 2026-04-20

reasoning tools

Qwen qwen/qwen3.5-plus-20260420

Qwen3.5 Plus (April 2026) is a large-scale multimodal language model from Alibaba. It accepts text, image, and video input and produces text output, with a 1M token context window. This...

Input $/1M: $0.30
Output $/1M: $1.80
Context: 1M
Max output: 66K

Alternatives, and where the router puts Qwen3.5 Plus 2026-04-20

Qwen3.5 Plus 2026-04-20 earns a request when it needs step-by-step reasoning, tool calls, very long inputs; a short, general request would go to MiniMax M3.1 Flash (free) instead - free per million input tokens against $0.30 here; and the hardest requests, where the quality floor rules it out, to Claude Opus 5.5 (batch). Your rules decide the floor; the trace shows the comparison for every request.

Cheaper alternatives

Lower input price and an intelligence index within 5 points (this model has no published index).

On this deployment

Nothing on this deployment answers as this model yet. Connect your own provider under Model providers, or add a target to your catalogue - the router picks it up without retraining.

Not available here yet

Signed in, add the model under Model providers; self-hosting, add a target with metadata.model set to this id.

targets.yamlyaml

# targets.yaml - declare a target that runs Qwen3.5 Plus 2026-04-20
targets:
  - id: qwen3-5-plus-20260420
    kind: llm
    name: Qwen3.5 Plus 2026-04-20
    metadata:
      model: qwen/qwen3.5-plus-20260420          # links the target to this catalogue entry
    capabilities:
      domains: [general]
      supports_tools: true
      context_window: 1000000
    cost:
      usd_per_1k_tokens: 0.001050

Price among Qwen models

Input list price per million tokens; Qwen3.5 Plus 2026-04-20 is the 8th cheapest of 13 listed.

1
Qwen3.7 Flash
$0.03
2
Qwen3.8 27B
$0.04
3
Qwen3.6 35B A3B
$0.10
4
Qwen3.8 Omni Flash
$0.15
5
Qwen3.8 Flash
$0.15
6
Qwen3.6 Flash
$0.19
7
Qwen3.7 Plus (batch)
$0.23
8
Qwen3.5 Plus 2026-04-20
$0.30
9
Qwen3.7 Plus
$0.32
10
Qwen3.7 Max
$1.48
11
Qwen3.8 Max (0902)
$2.00
12
Qwen3.8 2.4T A95B
$2.00

More from Qwen

List price is where the decision starts

Qwen3.5 Plus 2026-04-20 earns a request when it beats the field on your objective, not on the vendor's page.

The specification above is what Qwen publishes. What the router uses is the price you actually pay here, the latency measured on this deployment and the outcomes people reported - and it compares those against every other model that could take the request. Price a workload on the estimator, or send one live in the playground.

Photo: RDNE Stock project

For the business

What it means for which models you pay for.

Catalogue of every vendor
The right model, not the famous one
Price, context, abilities and benchmark indexes side by side, with the model that fits each task named.
The rankings
89% less
Lower cost per request
On the 150-prompt benchmark the router spent 89% less than sending every prompt to the reference model, and the judged quality went up, not down.
Read the benchmark
Per million tokens, every model
Prices you can compare

Specification

Qwen3.5 Plus 2026-04-20

Alternatives, and where the router puts Qwen3.5 Plus 2026-04-20

Cheaper alternatives

On this deployment

Price among Qwen models

More from Qwen

Qwen3.5 Plus 2026-04-20 earns a request when it beats the field on your objective, not on the vendor's page.

What it means for which models you pay for.

The right model, not the famous one

Lower cost per request

Prices you can compare

Better alternatives