Amazon Kiro offers a free tier ("Free"). We are not publishing a free-tier verdict for OpenAI Codex. Tier "Freemium" is a paid product with a trial-shaped entry point, not a stated free tier. We are not publishing a stability rating for OpenAI Codex. We are not comparing the two pricing histories.
A verdict here is not a fixed property of the vendor. A one-off pricing event demotes a vendor while its recorded date falls in the last 180 days and then lapses on its own, with nothing about the vendor having changed; a standing condition — a free tier withdrawn, a product retired — does not lapse with time. A badge carrying a date states the record it rests on; a badge with no date rests on no record in force.
Claude-powered AI IDE by Amazon (GA launch) — KIRO FREE $0 per month 50 credits. KIRO PRO $20 per user / month 1,000 credits. KIRO PRO+ $40 per user / month 2,000 credits. KIRO PRO MAX $100 per user / month 5,000 credits. KIRO POWER $200 per user / month 10,000 credits. Add-on credits are $0.04/credit. $20 credit towards first paid plan upgrade.
Cloud-native coding agent by OpenAI. Available with a ChatGPT subscription and, separately, with an API key billed on token use; both routes are current. ChatGPT Business has two seat types, both carrying Codex: Standard at $20/user/mo billed annually ($25 monthly) and Premium at $100/user/mo billed annually ($125 monthly), where Premium buys 5x more usage than Standard and removes the five-hour usage limit. Also in ChatGPT Plus ($20/mo) and Pro (from $100/mo). Codex-only pay-as-you-go seats closed to new Business workspaces in June 2026; existing seats continue. The Codex pricing page we cite lists only the Standard seat — the Premium seat is published on OpenAI's business pricing page. $100 credit per new Codex team member (up to $500/team, limited time). 2M+ weekly users. API via codex-mini at $1.50/1M input, $6/1M output tokens.
Pricing Change History
Amazon Kiro
restructureddiscovered 2026-09-03 · effective date unknownmedium impact
The tier names have changed. 'Pro+' is now 'Pro Max'. There is a new 'Pro Max' tier at $100/month for 5,000 credits. The sign-up bonus is now $20 towards a paid plan, instead of 500 bonus credits. Add-on credits are available for all paid tiers and cost $0.04/credit, with packs ranging from $5 to $100. Unused add-on credits roll over for 12 months. Source ↗
restructuredeffective 2026-04-13medium impact
Kiro pricing model clarified: uses credits (not interactions). Credits metered to 0.01 increments, model-dependent rates (Sonnet 4 costs 1.3x more than Auto). $0.04/credit overage (disabled by default). 500 bonus credits for new users (30 days). Enterprise tier with SAML/SCIM SSO. GovCloud ~20% premium, no free tier in GovCloud. Source ↗
neweffective 2026-04-09high impact
Amazon Kiro launched GA with a free tier of 50 credits/month. Claude-powered IDE focused on spec-driven development. Pro $20/mo (1,000 credits), Pro+ $40/mo (2,000), Power $200/mo (10,000). Credits metered to 0.01 increments, model-dependent rates. $0.04 overage per credit. Enterprise tier available. Source ↗
neweffective 2026-04-07medium impact
Amazon Kiro AI coding assistant launched GA with tiered credit-based pricing: Free tier (50 credits/month), Pro ($20/month, 1,000 credits), Pro+ ($40/month, 2,000 credits). Credits metered to 0.01 increments, model-dependent rates. Source ↗
OpenAI Codex
restructuredeffective 2026-04-03medium impact
Switched from per-seat subscription to pay-as-you-go token-based pricing. Teams can add Codex-only seats billed on token consumption with no rate limits. ChatGPT Business price cut from $25 to $20/month (annual). $100 credit per new Codex team member (up to $500/team, limited time) Source ↗
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