4.0.0 org.springframework.boot spring-boot-starter-parent 4.1.1 com.ankurm observability 1.0.0 observability Spring AI 2.0 observability: token usage, latency and cost with Micrometer, Prometheus and OpenTelemetry, against the real OpenAI model class and a local fake server. 25 2.0.1 org.springframework.ai spring-ai-bom ${spring-ai.version} pom import org.springframework.boot spring-boot-starter-webmvc org.springframework.boot spring-boot-starter-actuator io.micrometer micrometer-registry-prometheus org.springframework.boot spring-boot-starter-opentelemetry org.springframework.ai spring-ai-starter-model-openai org.springframework.boot spring-boot-starter-test test io.opentelemetry opentelemetry-sdk-testing test org.springframework.boot spring-boot-maven-plugin org.apache.maven.plugins maven-surefire-plugin -Duser.timezone=UTC -Dstdout.encoding=UTF-8 -Dfile.encoding=UTF-8