Anthropic / manual · models.dev

Claude Opus 5

Strongest Claude Opus model for coding, agents, and professional work

Encoding fertility 1.71×

Harnesses

Same model, different drivers. ChatGPT is not OpenCode. $ / MU is only set when every official task passed. $ / pass still shows on a partial run; it does not rank. Time is output tokens at 80 tok/s, not wall clock.

Stack	Passed	Attempts	Time	$ / MU	$ / pass	$ / hr	Tokens / pass	Burn	$ / Anthropic
Claude Codexhigh	3/3	4	53m 20s	$0.002056	$2.94	$35.38	85,368	1.33×	$2.94
Claude Codemedium	3/3	3	40m 00s	$0.001322	$1.89	$114.81	64,011	1.00×	$1.89
Claude Codemax	3/3	4	50m 06s	$0.002234	$3.20	$20.18	80,198	1.25×	$3.20
Claude Codehigh	3/3	4	53m 20s	$0.001948	$2.79	$42.70	85,360	1.33×	$2.79

Official jobs

Pass or fail on each sealed job. Attempts include retries. Failed tries stay in the bill.

Harness	Durable work queue 4/4	JSON Patch (RFC 6902 subset) 4/4	Token bucket and sliding window 4/4
Claude Code · xhigh	pass · 2	pass · 1	pass · 1
Claude Code · medium	pass · 1	pass · 1	pass · 1
Claude Code · max	pass · 2	pass · 1	pass · 1
Claude Code · high	pass · 2	pass · 1	pass · 1

Tokens by job

Billed tokens on each official job, including retries. Cache reads drop out of this count.

Claude Code · xhigh
128,060Durable work queue
64,020JSON Patch (RFC 6902 subset)
64,024Token bucket and sliding window
Claude Code · medium
64,012Durable work queue
64,010JSON Patch (RFC 6902 subset)
64,012Token bucket and sliding window
Claude Code · max
112,543Durable work queue
64,030JSON Patch (RFC 6902 subset)
64,020Token bucket and sliding window
Claude Code · high
128,050Durable work queue
64,014JSON Patch (RFC 6902 subset)
64,016Token bucket and sliding window

Where the bill goes

Failed attempts stay in the bill. Cache hits are a discount, shown separately.

Claude Code · xhigh440,084
Cache hit 2,557,056 (discount, not extra work)
Claude Code · medium283,177
Cache hit 613,700 (discount, not extra work)
Claude Code · max512,813
Cache hit 3,757,045 (discount, not extra work)
Claude Code · high420,867
Cache hit 1,862,919 (discount, not extra work)

Uncached in
Output
Thinking
Cache write

Retry tax

Attempts are harness calls, including failed hidden-verifier retries. Extra tries stay in the bill.

Claude Codexhigh4 attempts · 1 extra / 3 jobs
Claude Codemedium3 attempts / 3 jobs
Claude Codemax4 attempts · 1 extra / 3 jobs
Claude Codehigh4 attempts · 1 extra / 3 jobs

Cache hits

Hits divided by uncached input plus hits. No cache means the harness did not report a discount.

Claude Codexhigh100%
Claude Codemedium100%
Claude Codemax100%
Claude Codehigh100%

Time vs $ / MU

Decode time at 80 tok/s against what that finish cost. A long token bill is not the same as an expensive one.

Encoding by slice

Native tokens per MU on the same frozen basket. Tool schemas are where fertility often doubles.

English prose30% of the basket1.31×
Code25% of the basket1.60×
Structured15% of the basket1.17×
Tool schemas10% of the basket1.42×
CJK10% of the basket4.64×
Instructions10% of the basket1.33×

Slice	Characters	Native tokens	Fertility	True in	Source
English prose	4,474	1,470	1.31×	$6.57	official
Code	2,321	927	1.60×	$7.99	official
Structured	3,067	899	1.17×	$5.86	official
Tool schemas	2,378	844	1.42×	$7.10	official
CJK	831	964	4.64×	$23.20	official
Instructions	1,164	386	1.33×	$6.63	official

Endpoints

Provider	SKU	List in	List out	Cache hit	Cache write
Anthropic	`claude-opus-5`	$5.00	$25.00	$0.50	$6.25

All stacks