Which is cheaper, Claude Fable 5.1 and Ling 3.1 Flash?

Ling 3.1 Flash has the lowest input price. Per 1M input tokens: Claude Fable 5.1 from $10.00 and Ling 3.1 Flash from $0.07.

Which has the larger context window, Claude Fable 5.1 and Ling 3.1 Flash?

Claude Fable 5.1 has the largest context window: Claude Fable 5.1 1,000,000 tokens and Ling 3.1 Flash 262,144 tokens.

Which is smarter, Claude Fable 5.1 and Ling 3.1 Flash?

Claude Fable 5.1 scores highest on the Artificial Analysis Intelligence Index: Claude Fable 5.1 47.2 and Ling 3.1 Flash 29.6.

Can I switch between Claude Fable 5.1 and Ling 3.1 Flash 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, inclusionai/ling-3.1-flash).

Claude Fable 5.1 vs Ling 3.1 Flash

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

Ling 3.1 Flash inclusionAIinclusionai/ling-3.1-flash

Creator

Anthropic

inclusionAI

Released

Sep 1, 2026

Oct 2, 2026

Context window

262K

Input / 1MLowest provider price

$10.00

$0.07

Output / 1MLowest provider price

$50.00

$0.22

Providers

IntelligenceArtificial Analysis index

47.2

29.6

Accepts

Text, Image, Files

Text

Produces

Text

Tool calling

Yes

Structured output

Yes

Reasoning

Yes

Claude Fable 5.1 vs Ling 3.1 Flash: summary

Claude Fable 5.1 and Ling 3.1 Flash 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.

Ling 3.1 Flash, from inclusionAI, has a 262,144-token context window, costs $0.07/1M input and $0.22/1M output tokens and scores 29.6 on the Artificial Analysis Intelligence Index.

Ling 3.1 Flash is the cheapest on input, 143× 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="inclusionai/ling-3.1-flash", messages=[...])

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Benchmark scores sourced from ArtificialAnalysis