LLM Reference

Chameleon Models by AI at Meta

AI at MetaChameleon Research LicenseOpen weights
2 models2024Up to 4k ctx

Last refreshed 2026-07-09. Next refresh: weekly.

Details

ResearcherAI at Meta
Commercial useCommercial use: non-commercial
Models2
Released2024
Max context4k

About

The Chameleon family of large language models (LLMs), developed by Meta AI, marks a significant advancement in multimodal AI. These models feature an innovative early-fusion architecture that integrates both images and text seamlessly, allowing simultaneous processing and generation in any sequence. Unlike traditional models that handle modalities separately, Chameleon holistically combines visual and textual data from the beginning, which enhances its understanding of complex inputs. This architecture facilitates tasks like image captioning, visual question answering, and mixed-modal generation. A notable innovation is its vector quantization approach, enabling image tokenization compatible with transformer text processing. The models are accessible in various sizes, including the publicly available 7B and 34B parameter versions, and have outperformed other leading models like Google's Gemini Pro and OpenAI's GPT-4V in specific tasks. Additionally, another version of Chameleon, developed by UCLA and Microsoft, focuses on compositional reasoning with integrated tool usage, achieving state-of-the-art results in benchmarks such as ScienceQA.

Decision facts

Best fit
coding
Capability starting point
Chameleon 34B with 4k context
Lowest tracked input
Not tracked
Closest related family
Segment Anything

Current Variants

Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.

2 in view

Use when the workload needs 4k context and 34B parameters.

2024-064k context34B parameters

Use when the workload needs 4k context and 7B parameters.

2024-064k context7B parameters

Release Timeline

1 release group
2024-06
2 current
Chameleon 34B
4k context34B parameters
Current
Chameleon 7B
4k context7B parameters
Current

Specifications(2 models)

Chameleon model specifications comparison
ModelReleasedContextParameters
Chameleon 34B2024-064k34B
Chameleon 7B2024-064k7B