Claude Opus 5.5
anthropic/claude-opus-5-5
most intelligent Opus for agents and coding.
cmd --model claude-opus-5-5
Intelligence index
57.6
Output speed
not yet scored
Input
$4 /M
Output
$20 /M
Cache read
$0.20 /M
Agent-loop cost
$1.34 /M in
Context window
1M tokens
Released
September 22, 2026
Modalities
→
vs. the lineup
Claude Opus 5.5 beside its stablemates and nearest rivals. The ◆ marks the best value in each column across every row shown.
pin a rival:
| Model | Intelligence | Coding | Speed | Input $/M | Output $/M | Blended $/M | Context |
|---|---|---|---|---|---|---|---|
| Claude Opus 5.5 ◆ | 57.6◆ | —◆ | —◆ | $4◆ | $20◆ | $8◆ | 1M◆ |
| Claude Fable 5.1 | 53.4◆ | 81.6◆ | 66.8◆ | $10◆ | $50◆ | $20◆ | 1M◆ |
| Claude Opus 5 | 50.8◆ | 78◆ | 53.7◆ | $5◆ | $25◆ | $10◆ | 1M◆ |
| Claude Fable 5 | 49.6◆ | 76.5◆ | —◆ | $10◆ | $50◆ | $20◆ | 1M◆ |
| Claude Sonnet 5 | 38.2◆ | 71.5◆ | 82.8◆ | $2◆ | $10◆ | $4◆ | 1M◆ |
| Claude Sonnet 4.6 | 30.1◆ | 63◆ | —◆ | $3◆ | $15◆ | $6◆ | 1M◆ |
| DeepSeek V4 Pro (latest)pinned | 36◆ | 68.8◆ | 78.6◆ | $0.66◆ | $1.98◆ | $0.99◆ | 1M◆ |
| DeepSeek V4 Flash (latest)pinned | 34◆ | 69.1◆ | —◆ | $0.15◆ | $0.60◆ | $0.26◆ | 1M◆ |
coding performance
The Intelligence Index and its sub-scores, ranked against every scored model in the catalog. A metric that has not been measured for Claude Opus 5.5 has been left empty.
Intelligence Index
57.6
#1 of 67 scored
Long-context reasoning
84.7
reasoning across a long context
SciCode
66.9
scientific coding
usage calculator
How far a month of credits goes on Claude Opus 5.5.
Claude Opus 5.5 runs on Max and up — from $100/mo.
Input tokensfresh prompt
800Output tokensmodel reply
180Cache read tokensre-read context
50Kcost / request $0.017 · in $4 · out $20 · cache $0.20 per M
fresh input 19%output 21%cache reads 60%
Requests / 30 days
6.0K
$100 credits ÷ $0.017 per request
~1.2K quick fixes~238 bug fixes~40 feature PRs
what real work costs
Real coding tasks priced end to end on Claude Opus 5.5, from a quick lookup to a full-repo agent run.
One agent task
$0.45
180K in at 75% cache hit, 12K out
What you pay
$2.33 /M
all-in across every token that task touched
Sticker input
$4 /M
cache reads bill at $0.20 /M instead
| Task | Tokens in · out | Claude Opus 5.5 | Claude Haiku 4.5 |
|---|---|---|---|
| Quick lookup / one-liner | 8K · 1K | $0.02 | $0.0065 |
| Review a 500-line PR | 60K · 4K | $0.16 | $0.04 |
| Fix a bug (agent loop) | 180K · 12K | $0.45 | $0.12 |
| Refactor a module | 320K · 20K | $0.80 | $0.21 |
| Full-repo agent run | 900K · 45K | $1.83 | $0.49 |
frequently asked
How much does Claude Opus 5.5 cost?
$4/M input and $20/M output, cache reads $0.20/M. In an agent loop most input is cache-read, so the effective input rate is about $1.34/M.Which plan do I need?
Available on Max and above.
How do I switch to it?
Run
cmd --model claude-opus-5-5, or type /model in a session and pick it. You can switch mid-session without losing context.Ship code that matches your taste
Command Code is the AI coding agent that continuously learns your taste. Start for $1.
Benchmarks from Artificial Analysis (v4.3)commandcode.ai/models/claude-opus-5-5