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Claude Opus 5.5 (Fast)

anthropic·anthropic/claude-opus-5.5-fast·GA·Closed·claude-opus series·NEW
Claude model for long-running agentic coding and knowledge work

Specs & pricing

Input / output per 1M tokens
Reference price·Vercel AI Gateway
$8.00 / $40.00
Blended $16.00 · Cache read $0.40
Lowest paid·Vercel AI GatewayCloud
$8.00 / $40.00
Blended $16.00
Context
1,000,000
Output limit
128,000
Knowledge cutoff
2026-06
Released / updated
2026-09-22 / 2026-09-22
Capabilities
✓ Reasoning✓ Tool use? Structured outputTemperature✓ Attachments
Modalities
TextImagePDF

Available at 1 providers1 with public prices

ProviderTierInputOutputCache readCache writeContextOutput limitStatus
Vercel AI GatewayCloud$8.00$40.00$0.40$10.001,000,000128,000

Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.

Reasoning control

effort = loweffort = mediumeffort = higheffort = xhigheffort = max

Your usage cost

1Vercel AI Gateway$2,688.00
The cheapest paid channel is the only channel.

Price historyone sample accumulated per data sync

Input list $8.00Output list $40.00Min blended $16.00

Price history accumulates from each data sync; currently only 1 sample(s) (2026-09-23). Each future sync adds a point, and once accumulated a line is drawn here.

Related models

Claude Opus 5.5same series$4.00 / $20.00Claude Opus 5.5 (EU)same series$5.50 / $27.50Claude Opus 5.5 (AU)same series$4.40 / $22.00GLM-5.2cheaper alternative$1.40 / $4.40Kimi K3cheaper alternative$3.00 / $15.00GLM-5.3-Flashcheaper alternative$0.15 / $0.50GLM-5.3cheaper alternative$1.40 / $4.40
Data partly from models.dev (MIT) · Vercel AI Gateway official docs ↗