Claude Sonnet 4.5

Name: Claude Sonnet 4.5
Author: OpenCode Zen

proprietary

Intelligence

Reasoning

Speed

Context

200K

Max output

64K

Input price

$3/1M tokens

Output price

$15/1M tokens

Capabilities

Show unsupported (2)

Reasoning & Interaction

Reasoning

Tool Calling

Output Control

Structured Output

JSON Mode

Infrastructure

Streaming

Batch Processing

Details

Model IDclaude-sonnet-4-5

ProviderOpenCode Zen

CreatorAnthropic

Familyclaude-sonnet

Licenseproprietary

Statusactive

Typechat

Input modalitiestext

Output modalitiestext

Open weightNo

Parameters—

Architecture—

Context window200K tokens

Max input—

Max output64K tokens

Reasoning tokens—

Knowledge cutoff2025-01

Training data cutoff2025-07

Release date2025-09-29

Deprecation date2026-09-30

Sourceofficial

Pricing

Context lengthPer 1M tokens

	Input	Output	Cached Read	Cached Write
≤ 200K tokens	$3	$15	$0.3	$3.75
> 200K tokens	$6	$22.5	$0.6	$7.5

Family Comparison: claude-sonnet

Model	Caps	Perf	Speed	Context	Max out	Pricing
Claude Sonnet 4	S	—	—	—	—	—
Claude Sonnet 5.5	RTJJMSB	—	—	1M	128K	$2$10
Claude Sonnet 5	RTJJMSB	—	—	1M	128K	$2$10
Claude Sonnet 4.5	RTJJMSB	—	—	200K	64K	$3$15
Claude Sonnet 4.6	RTJJMSB	—	—	1M	128K	$3$15

API

GET/v1/models/opencode/claude-sonnet-4-5

Claude Sonnet 4.5

claude-sonnet-4-5

Changes · 5 entries

claude-sonnet-4-5updateca7a400Nov 2, 2026, 03:02 AM

pricinginput$3output$15cached input$0.3cache write$3.75tiers[{"label":"Context length","unit":"Per 1M tokens","column...

claude-sonnet-4-5updateb2f45bfOct 29, 2026, 03:29 AM

pricinginput$3output$15cached input$0.3cache write$3.75tiers[{"label":"Context length","unit":"Per 1M tokens","column...

claude-sonnet-4-5updateb301ebeMar 23, 2026, 11:47 PM

modalitiesinput["text"]output["text"]

claude-sonnet-4-5update7a4f1f6Mar 22, 2026, 05:43 AM

model_typechat

claude-sonnet-4-5create7f5c66fMar 21, 2026, 05:16 AM