What will be the standard API output price (USD per million output tokens) of Anthropic's most capable generally-available model, as of the end of May 2027?

This forecast structurally reflects a bimodal distribution driven by the resolution of ongoing U.S. export-control constraints on Anthropic's top-tier models. As of mid-June 2026, the Mythos-class Fable 5 and Mythos 5 models ($50 per million output tokens) are globally suspended under a U.S. BIS export-control directive 55 sources, leaving Opus 4.8 ($25/MTok) as the most capable generally-available (GA) model. The trajectory of this forecast hinges on whether Anthropic restores access to a $50 flagship or defaults to the $25 Opus tier by May 2027.

The $50 Anchor (Median: 49.67, p75: 52.67) There is a ~55–60% probability that Anthropic restores access to a Mythos-class tier or introduces a compliant frontier successor as its top GA model. Anthropic faces immense commercial pressure to re-establish a $50/MTok flagship tier, supported by a disclosed $47B revenue run-rate, massive compute commitments, a $65B Series H at a $965B valuation anthropic.com, and a confidential draft S-1 filed June 1 anthropic.com. The 11.5-month horizon provides sufficient runway to resolve the 'no foreign nationals' restrictions through compliance safeguards or architectural changes. If restored, Anthropic's strong revealed preference for holding generation pricing flat anchors the bulk of the probability mass at $50/MTok, positioning the median exactly at this threshold.

The $25 Anchor (p10: 24.0, p25: 25.33) If the political dispute over export controls or broader supply-chain constraints prove intractable, the top GA model will default to the Opus line. Opus pricing has remained rigidly flat at $25/MTok across versions 4.5 through 4.8. Anthropic has historically refused to cut flagship pricing below this $25 floor—resulting in the tight p10–p25 range—even in the face of aggressive competitive pricing from Google's Gemini 3.1 Pro ($12/MTok) csis.org and OpenAI's GPT-5.5 ($30/MTok) developers.openai.com.

The Upper Tail (p90: 74.33) A significant upper tail accounts for the possibility that Anthropic launches a heavily compute-constrained successor model priced well above the $50 Fable/Mythos baseline. Historical precedents support higher flagship pricing at the absolute frontier: older Opus 4/4.1 launched at $75/MTok docs.anthropic.com, and the previously gated Mythos Preview was priced at $125/MTok for exclusive partners [claudefa.st]. However, the 90th percentile is constrained near $74 rather than $100+, as broader competitive price compression from OpenAI and Google will ultimately cap extreme upside for a widely available GA tier.