Claude Opus 5 vs GPT-5.6 Terra
Live Unit Economics, TTFT Latency & Reasoning Benchmark Analysis
Which model is better: Claude Opus 5 or GPT-5.6 Terra?
Verified Performance & Unit Economics Delta
Daily synchronized metrics from synthetic latency endpoints and benchmark evaluations.
| Metric / Dimension | Claude Opus 5 | GPT-5.6 Terra | Net Delta / Advantage |
|---|---|---|---|
| Input Cost / 1M Tokens | $5.00 | $1.50 | GPT-5.6 Terra is 3.3x cheaper |
| Output Cost / 1M Tokens | $25.00 | $6.00 | GPT-5.6 Terra (316.7% lower) |
| Avg TTFT Response Latency | 340ms | 210ms | GPT-5.6 Terra (+130ms faster) |
| SWE-bench Verified (Coding) | 82.4% | 65.4% | Claude Opus 5 (+17.0% lead) |
| Inference Value Score (IVR) | 42.7 / 100 | 72.5 / 100 | GPT-5.6 Terra (+29.8 pts) |
Interactive Monthly Token Economics & ROI Forecaster
Model your expected production workload across prompt (input) and completion (output) tokens.
Estimated Monthly Spend
$5/1M in · $25/1M out
$1.5/1M in · $6/1M out
When to Choose Claude Opus 5
Choose Claude Opus 5 when you need Pinnacle autonomous software architecture, whole-system enterprise codebases, PhD-level scientific synthesis, and complex multi-agent delegation. and have an infrastructure budget aligned with $5.00/1M tokens.
When to Choose GPT-5.6 Terra
Choose GPT-5.6 Terra when you need Mainstream production enterprise workflows, high-throughput developer copilots, and structured data synthesis. and prioritize OpenAI ecosystem integration at $1.50/1M tokens.
Related Questions & Decision Factors
Which is cheaper: Claude Opus 5 or GPT-5.6 Terra?
GPT-5.6 Terra is cheaper at $1.50/1M input tokens compared to $5.00/1M for Claude Opus 5.
Which model has lower latency: Claude Opus 5 or GPT-5.6 Terra?
GPT-5.6 Terra delivers faster response times with an average TTFT of 210ms vs 340ms for Claude Opus 5.
When should you choose Claude Opus 5?
Choose Claude Opus 5 when you need Pinnacle autonomous software architecture, whole-system enterprise codebases, PhD-level scientific synthesis, and complex multi-agent delegation. and have an infrastructure budget aligned with $5.00/1M tokens.
When should you choose GPT-5.6 Terra?
Choose GPT-5.6 Terra when you need Mainstream production enterprise workflows, high-throughput developer copilots, and structured data synthesis. and prioritize OpenAI ecosystem integration at $1.50/1M tokens.