We present the results of a set of model atmospheres and synthetic spectra computed with the PHOENIX code .
The models cover a range of effective temperatures ( 2 700 K \leq T _ { eff } \leq 10 000 K ) , gravities ( - 0.5 \leq \log ( g ) \leq 5.5 ) and metalicities ( - 4.0 \leq [ Z / H ] \leq + 0.5 ) .
In addition , variations of alpha elements are considered for each metalicity .
The models are computed with a homogeneous set of input data in order to allow for direct relative comparison between the models .
For example , all models use a mixing length of l / H _ { p } = 2.0 .
We provide synthetic spectra with a resolution of 0.2 nm from the UV to the infrared for all models .
We give a brief overview of the input physics and show illustrative results .
All synthetic spectra are available via ftp : ftp.hs.uni-hamburg.de/pub/outgoing/phoenix/GAIA .