Mistral releases Leanstral 1.5 with claimed performance gains over Claude on developer tasks

According to Mistral, the company released Leanstral 1.5, a 119-billion-parameter model claiming 4x faster inference and 30 percent cheaper costs than Claude on developer onboarding tasks, with practical parity on coding performance. Multiple posts document real-world test results showing the model's competitive standing in the developer tools market.