| Maker | Anthropic (founded by ex-OpenAI safety researchers) | OpenAI |
| Flagship model (May 2026) | Claude Opus 4.7 / Sonnet 4.6 / Haiku 4.5 | GPT-5 / GPT-5 Turbo / GPT-4o |
| Context window | 1,000,000 tokens (Opus 4.7), 200K standard | 256,000 tokens (GPT-5) |
| Default training on your data | No on Team / Enterprise / API | No on Team / Enterprise / API |
| Constitutional AI training | Yes (rules-based safety baked into training) | No (RLHF only) |
| Coding agent | Claude Code (CLI, IDE plugins, SDK) | Codex CLI, ChatGPT desktop app |
| Tool / function calling | Yes, with parallel tool use and MCP servers | Yes, with custom GPTs and Actions |
| Image generation | No native image gen (analyses images) | Yes (DALL-E 3 / GPT-image-1) |
| Voice mode | No (text only via Claude.ai) | Yes (advanced voice mode) |
| Compliance | SOC 2 Type II, HIPAA, ISO 27001, ISO 42001 | SOC 2 Type II, HIPAA, ISO 27001, ISO 27018 |
| Australian data residency | AWS Sydney via Amazon Bedrock | Azure Australia East (Enterprise) |
| Pricing (business tier) | $30 USD/seat/mo (Team), Enterprise custom | $30 USD/seat/mo (Team), Enterprise custom |