+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
Gemini 2.5 Flash vs GPT-5.1 Codex Max
Comprehensive side-by-side LLM comparison
GPT-5.1 Codex Max leads with 44.0% higher average benchmark score. Gemini 2.5 Flash supports multimodal inputs. Gemini 2.5 Flash is available on 2 providers. Overall, GPT-5.1 Codex Max is the stronger choice for coding tasks.
+
+
+
+
Google DeepMind
Gemini 2.5 Flash, released by Google in June 2025, is a large language model from the Gemini 2.5 family optimized for high-throughput, cost-efficient deployments with multimodal reasoning. It features a 1M token context window, hybrid thinking control, and native support for text, image, video, and audio input. Gemini 2.5 Flash targets latency-sensitive applications, document analysis, and high-volume API workloads that benefit from combined reasoning and generation in a single model.
+
+
+
+
OpenAI
GPT-5.1 Codex Max, released by OpenAI in November 2025, is an enhanced coding variant from the GPT-5.1 Codex line, designed for more complex software engineering tasks requiring additional reasoning depth. It targets large-scale code generation, automated refactoring, and sophisticated agentic development workflows.
4 months newer
Gemini 2.5 Flash
Google DeepMind
2025-06-17
GPT-5.1 Codex Max
OpenAI
2025-11
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
+
+
+
+
Gemini 2.5 Flash
Average Score:16.4%
+
+
+
+
GPT-5.1 Codex Max
Average Score:60.4%(+44.0%)
Performance comparison across key benchmark categories
+
+
+
+
Gemini 2.5 Flash
Coding16.4%
+
+
+
+
GPT-5.1 Codex Max
Coding60.4%(+44.0%)
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
Gemini 2.5 Flash
2 providers
Google Cloud Vertex AI
+
+
+
+
GPT-5.1 Codex Max
+
+
+
+
Gemini 2.5 Flash
Avg Score:16.4%
Providers:2
+
+
+
+
GPT-5.1 Codex Max
Avg Score:60.4%(+44.0%)
Providers:0