Which is cheaper, Claude Fable 5.1 and Nemotron 3.5 Super VL?

Nemotron 3.5 Super VL has the lowest input price. Per 1M input tokens: Claude Fable 5.1 from $10.00 and Nemotron 3.5 Super VL from $0.15.

Which has the larger context window, Claude Fable 5.1 and Nemotron 3.5 Super VL?

Claude Fable 5.1 has the largest context window: Claude Fable 5.1 1,000,000 tokens and Nemotron 3.5 Super VL 262,144 tokens.

Which is smarter, Claude Fable 5.1 and Nemotron 3.5 Super VL?

Claude Fable 5.1 scores highest on the Artificial Analysis Intelligence Index: Claude Fable 5.1 47.2 and Nemotron 3.5 Super VL 13.6.

Can I switch between Claude Fable 5.1 and Nemotron 3.5 Super VL without changing my code?

Yes. All of them are served through FastRouter's OpenAI-compatible API, so switching is a change of the model parameter (anthropic/claude-fable-5.1, nvidia/nemotron-3.5-super-vl).

Claude Fable 5.1 vs Nemotron 3.5 Super VL

Side-by-side pricing per provider, context window, benchmark scores and speed, all on one OpenAI-compatible API.

Estimate monthly cost for these models

Claude Fable 5.1 Anthropicanthropic/claude-fable-5.1

Nemotron 3.5 Super VL NVIDIAnvidia/nemotron-3.5-super-vl

Creator

Anthropic

NVIDIA

Released

Sep 1, 2026

Sep 16, 2026

Context window

262K

Max output

128K

131K

Input / 1MLowest provider price

$10.00

$0.15

Output / 1MLowest provider price

$50.00

$0.50

Providers

IntelligenceArtificial Analysis index

47.2

13.6

Accepts

Text, Image, Files

Text, Image, Video

Produces

Text

Tool calling

Yes

Structured output

Yes

Reasoning

Yes

Claude Fable 5.1 vs Nemotron 3.5 Super VL: summary

Claude Fable 5.1 and Nemotron 3.5 Super VL are both available through FastRouter's OpenAI-compatible API, so switching between them is a change of model id, not a new integration.

Claude Fable 5.1, from Anthropic, has a 1,000,000-token context window, costs $10.00/1M input and $50.00/1M output tokens and scores 47.2 on the Artificial Analysis Intelligence Index.

Nemotron 3.5 Super VL, from NVIDIA, has a 262,144-token context window, costs $0.15/1M input and $0.50/1M output tokens and scores 13.6 on the Artificial Analysis Intelligence Index.

Nemotron 3.5 Super VL is the cheapest on input, 67× cheaper than the next model, Claude Fable 5.1 has the largest context window and Claude Fable 5.1 scores highest for intelligence.

Switch with one line

client = OpenAI(base_url="https://api.fastrouter.ai/api/v1", api_key="<FASTROUTER_API_KEY>") client.chat.completions.create(model="anthropic/claude-fable-5.1", messages=[...]) # or client.chat.completions.create(model="nvidia/nemotron-3.5-super-vl", messages=[...])

Full API docs

Frequently asked questions

More comparisons

Benchmark scores sourced from ArtificialAnalysis