What cards support OpenGL4.0 and Shader Model 4.0?

[Kreed]

So, I can't seem to find a list of this information anywhere. I am looking at working on a game, but I am unsure what the best choices are in terms of OpenGL version and Shader Model. Where can I find a list of what cards support what?

Thanks,
Kreed

[Ilian Dinev]

Shader Model 5 is GL4.
Shader Model 4: Geforce 8600, Radeon HD2000

http://en.wikipedia.org/wiki/Comparison_of_Nvidia_graphics_processing_units
http://en.wikipedia.org/wiki/Comparison_of_AMD_graphics_processing_units

[Alfonse Reinheart]

The OpenGL Wiki (http://www.opengl.org/wiki/Detecting_the_Shader_Model) also has this information.