3-year cost calculator
Pre-filled for OpenAI GPT → Anthropic Claude. Adjust every figure with your own numbers.
Every figure here is an illustrative estimate, not a vendor quote. Defaults are editable starting points compiled from public information; real, binding pricing comes from the vendor or an authorized distributor. See our methodology.
All figures are illustrative and fully editable — adjust the cost-per-M tokens and migration inputs with your own numbers. Not guaranteed vendor pricing (defaults reviewed May 2026). For a binding quote, use the request form below to reach an authorized distributor or partner.
Quick comparison: OpenAI GPT vs Anthropic Claude
Common trade-offs teams weigh when staying on OpenAI GPT versus moving to Anthropic Claude. These are general, commonly-reported considerations — not statements of fact about any vendor — so check them against your own contract and the vendors' current terms.
- Already in production — no migration effort or risk
- Mature ecosystem with vendor support and SLAs
- Per-token API pricing scales with usage
- Data leaves your environment to a third party
- Model and version deprecations force migrations
- Rate limits and single-vendor dependency
- Ongoing per-token api cost to budget for
- Commercial option with vendor support and SLAs
- Cost model: Per-token API
- Requires a migration (~12 weeks, low effort)
- Per-token API cost
Why teams evaluate alternatives to OpenAI GPT
Reasons commonly cited by users and in public industry coverage for re-evaluating OpenAI GPT. These are general, reported considerations — not statements of fact about OpenAI — and may not reflect your situation or the vendor's current terms. Verify against your own contract before deciding.
- Per-token API pricing scales with usage
- Data leaves your environment to a third party
- Model and version deprecations force migrations
- Rate limits and single-vendor dependency
The migration plan
Roughly 12 weeks for a mid-size estate, in six phases.
Tooling & automation
Deploy the open model on self-managed inference (vLLM/TGI) behind an OpenAI-compatible gateway, migrate prompts and evaluation suites, A/B test for quality, and shift traffic by workload.
OffVendor's wizard pre-fills these scripts with your environment — inventory export, disk/schema conversion, bulk provisioning, and validation.
Frequently asked
Is migrating from OpenAI GPT to Anthropic Claude worth it?
For most teams facing rising OpenAI GPT costs, yes — Anthropic Claude (per-token api) typically lowers 3-year total cost of ownership, though the right answer depends on workload complexity and in-house skills. Use the calculator to model your own numbers.
How long does a OpenAI GPT to Anthropic Claude migration take?
A typical mid-size estimate is around 12 weeks across six phases — discovery, design, pilot, waved production migration, validation, and decommission. Larger or more complex estates take longer.
What tools are used to migrate from OpenAI GPT to Anthropic Claude?
Deploy the open model on self-managed inference (vLLM/TGI) behind an OpenAI-compatible gateway, migrate prompts and evaluation suites, A/B test for quality, and shift traffic by workload.