Benchmarking GPT-5.6 vs. Claude Code and OpenCode: 2.2x Speed and 27% Cost Efficiency Analysis

Short summary

A benchmark comparing GPT-5.6, Claude Code, and OpenCode across 100k+ production code-generation requests on AWS T4 GPUs. GPT-5.6 leads with 1,820 tokens/sec, 115ms p95 latency, and $21.50/1M tokens, while Claude Code offers a balanced middle ground and OpenCode suits budget-constrained deployments. The analysis covers sparse attention, quantized weights, and batching optimizations driving GPT-5.6's 2.2x speed advantage.

• •GPT-5.6 achieves 1,820 tokens/sec at $21.50/1M tokens, outpacing Claude Code and OpenCode
• •Claude Code's hybrid cost model becomes economical above 100M monthly tokens
• •Hybrid architectures combining models for different workload types are recommended

Generated with AI, which can make mistakes.