Claude Opus 5 vs Gemini 3.8 Flash: pricing, Quality, Value, and benchmarks

Buyer access

Pricing, app access, and Conversation Value

• Humanity's Last Exam

  Normalized quality input

  52.6%

  Artificial Analysis Claude Opus 5 evaluation | Independent text-only HLE evaluation using adaptive reasoning at maximum effort over the 2,158-question set.

• SWE-Bench Pro

  Normalized quality input

  79.2%

  Anthropic Claude Opus 5 system card | Vendor-reported SWE-Bench Pro result using adaptive thinking at maximum effort, default sampling settings, averaged over five trials.

• Terminal-Bench 2.1

  Agentic terminal task completion

  89.0%

  Artificial Analysis Claude Opus 5 analysis | Independent Terminal-Bench 2.1 result for Claude Opus 5 at maximum effort.

• GPQA Diamond

  Normalized quality input

  93.2%

Anthropic's Opus successor pairs frontier reasoning and coding results with premium $5/$25 token pricing.

Claude Opus 5 combines a 1M-token context window with strong exact-variant HLE and SWE-Bench Pro results. Its $5 per million input-token and $25 per million output-token prices keep it in the premium tier, so it is best reserved for work where capability matters more than unit cost.

Google's newest generally available Flash model improves coding and agentic work while retaining introductory $0.75/$3.75 token pricing through 2026.

Gemini 3.8 Flash combines a 1M-token context window with current HLE and SWE-Bench Pro evidence, multimodal input, and unusually low introductory token prices. Google positions it for software engineering and agentic workflows; the standard $1.50/$7.50 prices begin January 1, 2027.