Claude Opus 5.5
ModelAPILicense not yet reviewed
What it is
Claude Opus 5.5 is Anthropic's model for long-running agentic coding and knowledge work, with a 1M-token context.
Best for
#2 of 3Model for Ship a SaaS MVP in a weekend
Total 6.9 / 10
- Task quality (30%)9 / 10#1 on WebDev Arena (1807, Oct 16 2026).
Evidence:0078 (source: LMArena)
- Cost per typical job run (20%)5 / 10$4/$20 per MTok; $5.98 per AA index task.
Evidence:0080 (source: Artificial Analysis)0079 (source: Anthropic)
- Latency / speed (15%)6 / 1097.5 output tokens/s.
Evidence:0080 (source: Artificial Analysis)
- Tool-calling & structured-output reliability (15%)7 / 1075.8% on τ²-Airline.
Evidence:0083 (source: OpenRouter)
- Context & modality support (10%)8 / 101M context, 128K output.
Evidence:0079 (source: Anthropic)
- Openness / deployability (10%)4 / 10Closed weights; Claude API, Bedrock, Google Cloud, Foundry.
Evidence:0079 (source: Anthropic)
Strengths
- #1 on WebDev Arena (1807) as of Oct 16, 2026.0078 (source: LMArena)
- 1M context, 128K max output.0079 (source: Anthropic)
Limits
- Pricier than Sonnet 5.5: $4/$20 per MTok.0079 (source: Anthropic)
Pricing
Paid
$4 input / $20 output per MTok.0079 (source: Anthropic)
As of . Check the vendor's page before buying.
License
License not yet reviewed
Alternatives in the same layer
Disclosures
- None