Claude Fable 5.1 vs Molmo 2 8B

Claude Fable 5.1 leads on the Visual Intelligence Index by 18.6 points, and Claude Fable 5.1 scores higher on 6 of the 7 benchmarks where the two differ.

Model

Compared with

AnthropicClaude Fable 5.176.2%Rank #3 Ai2Molmo 2 8B57.6%Rank #9

At a glance

Measure	Claude Fable 5.1	Molmo 2 8B
Visual Intelligence Index	76.2%	57.6%
Rank	#3 of 9	#9 of 9
Cost per taskMean over the benchmarks, at list price.	$0.517	—
Latency per taskEach benchmark's median, averaged.	9.0s	62.2s
Tokens per task	51,151	12,048
Input / 1M tokens	$10.00	—
Output / 1M tokens	$50.00	—
Context window	1M	37K
Availability	Proprietary	Open weights

How cost and latency are measured

Capabilities

Each capability index is a weighted mean of the benchmarks that contribute to the capability.

Capability	Claude Fable 5.1	Molmo 2 8B	Lead
Perception	75.3%	58.7%	+16.6
Spatial Reasoning	77.0%	61.0%	+16.0
Temporal Reasoning	76.4%	57.5%	+18.8
Action / Event Understanding	74.0%	51.1%	+22.9
Causal Reasoning	78.7%	61.7%	+17.0
Information Retrieval	74.7%	52.1%	+22.6

Benchmarks

Benchmark	Claude Fable 5.1	Molmo 2 8B	Lead
Video-MME v2	66.2%	27.5%	+38.7
LVBench	75.0%	48.6%	+26.3
Perception Test	77.3%	67.4%	+9.9
NExT-QA	86.8%	89.2%	−2.4
Q-Bench Video	71.0%	62.9%	+8.1
EgoSchema	80.4%	58.2%	+22.2
UCF101-AD	60.6%	19.5%	+41.1

Usability

Claude Fable 5.1

3.0/ 5

Reachable1.0: There is an endpoint you can call without hosting anything.
First-party API — supported
Third-party API — supported
Portable0.0: You can run it yourself, and are not tied to one vendor.
Open weights — not supported
Self-hostable — not supported
Multimodal input0.0: It takes the footage directly, rather than frames you extracted.
Video ingestion — not supported
Audio — not supported
Programmable1.0: Output you can parse, and tools it can call on its own.
Structured output — supported
Tool calling — supported
Operable1.0: Usable interactively and in bulk, not only one call at a time.
Streaming — supported
Batch API — supported

Molmo 2 8B

3.5/ 5

Reachable0.5: There is an endpoint you can call without hosting anything.
First-party API — supported
Third-party API — not supported
Portable1.0: You can run it yourself, and are not tied to one vendor.
Open weights — supported
Self-hostable — supported
Multimodal input0.5: It takes the footage directly, rather than frames you extracted.
Video ingestion — supported
Audio — not supported
Programmable1.0: Output you can parse, and tools it can call on its own.
Structured output — supported
Tool calling — supported
Operable0.5: Usable interactively and in bulk, not only one call at a time.
Streaming — supported
Batch API — not supported