Gemini 3.8 Flash vs Claude Fable 5.1

Gemini 3.8 Flash leads on the Visual Intelligence Index by 4.4 points, and Gemini 3.8 Flash scores higher on 6 of the 7 benchmarks where the two differ.

Model

Compared with

GoogleGemini 3.8 Flash80.6%Rank #2 AnthropicClaude Fable 5.176.2%Rank #3

At a glance

Measure	Gemini 3.8 Flash	Claude Fable 5.1
Visual Intelligence Index	80.6%	76.2%
Rank	#2 of 9	#3 of 9
Cost per taskMean over the benchmarks, at list price.	$0.0474	$0.517
Latency per taskEach benchmark's median, averaged.	25.5s	9.0s
Tokens per task	60,794	51,151
Input / 1M tokens	$0.75	$10.00
Output / 1M tokens	$3.75	$50.00
Context window	1M	1M
Availability	Proprietary	Proprietary

How cost and latency are measured

Capabilities

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

Capability	Gemini 3.8 Flash	Claude Fable 5.1	Lead
Perception	79.8%	75.3%	+4.5
Spatial Reasoning	82.5%	77.0%	+5.5
Temporal Reasoning	81.3%	76.4%	+5.0
Action / Event Understanding	78.2%	74.0%	+4.3
Causal Reasoning	81.6%	78.7%	+2.9
Information Retrieval	79.4%	74.7%	+4.7

Benchmarks

Benchmark	Gemini 3.8 Flash	Claude Fable 5.1	Lead
Video-MME v2	71.3%	66.2%	+5.1
LVBench	86.4%	75.0%	+11.4
Perception Test	85.5%	77.3%	+8.1
NExT-QA	88.0%	86.8%	+1.2
Q-Bench Video	69.3%	71.0%	−1.6
EgoSchema	80.8%	80.4%	+0.4
UCF101-AD	63.5%	60.6%	+2.9

Usability

Gemini 3.8 Flash

4.0/ 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 input1.0: It takes the footage directly, rather than frames you extracted.
Video ingestion — supported
Audio — 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

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