Comparison · Anthropic
Claude Opus 5.5 vs Claude Sonnet 5.5: pricing, allowances and benchmarks
Claude Opus 5.5 (Anthropic) and Claude Sonnet 5.5 (Anthropic): 4 shared subscriptions and 4 shared leaderboard snapshots, with workloads, sample dates and benchmark configurations.
Plan & benchmark data snapshot · How real prices are computed
As of 2026-10-16, 4 of 4 shared subscriptions use matching normalized workloads: Claude Opus 5.5 has a lower recorded token cost on 0, Claude Sonnet 5.5 on 4, with 0 tied. Their highest archived configurations score 57.62 and 55.98 on Artificial Analysis Intelligence Index v4.3; all 4 shared leaderboard snapshots, configurations and sources appear below.
- Shared subscriptions
- 4Both models available
- Comparable workloads
- 4Used for price ratios
- Shared leaderboards
- 4Highest archived configurations
- Official API prices
- 2/ 2Models with list prices
Plot both on the price–capability chart
Same plan, side by side
Each row is a subscription that includes both models at the same fee. Real cost = monthly fee ÷ the recorded monthly allowance. Each model's allowance assumes using the plan for that model; the columns cannot be added together. Click a price for its calculation and sources. Ratios use only matching normalized workloads.
| Plan / provider | Monthly fee | Claude Opus 5.5 | Claude Sonnet 5.5 | Recorded token cost |
|---|---|---|---|---|
| Claude ProAnthropic | $20/mo | $0.00655 /MTok 3.054B tokens/month Anthropic workload 2026-09-22 – 2026-09-27 · sampled · confidence High | $0.00327 /MTok 6.108B tokens/month Anthropic workload 2026-09-22 – 2026-09-27 · derived; uses the data date of Claude Pro · claude-opus-5.5 · confidence Low | Claude Sonnet 5.5 lower2× price ratio (higher/lower) |
| Claude Max 5x (9/14+)Anthropic | $100/mo | $0.00545 /MTok 18.334B tokens/month Anthropic workload 2026-09-29 – 2026-10-03 · sampled · confidence Medium | $0.00273 /MTok 36.668B tokens/month Anthropic workload 2026-09-29 – 2026-10-03 · derived; uses the data date of Claude Max 5x (9/14+) · claude-opus-5.5 · confidence Low | Claude Sonnet 5.5 lower2× price ratio (higher/lower) |
| Claude Max 20x (9/14+)Anthropic | $200/mo | $0.00634 /MTok 31.538B tokens/month Anthropic workload 2026-09-22 – 2026-09-27 · sampled · confidence Medium | $0.00317 /MTok 63.076B tokens/month Anthropic workload 2026-09-22 – 2026-09-27 · derived; uses the data date of Claude Max 20x (9/14+) · claude-opus-5.5 · confidence Low | Claude Sonnet 5.5 lower2× price ratio (higher/lower) |
| Droid MaxFactory | $200/mo | $0.07918 /MTok 2.526B tokens/month Anthropic workload 2026-09-29 · sampled · confidence Medium | $0.03959 /MTok 5.052B tokens/month Anthropic workload 2026-09-29 · derived; uses the data date of Droid Max · claude-opus-5.5 · confidence Medium | Claude Sonnet 5.5 lower2× price ratio (higher/lower) |
Leaderboards head to head
Each model's highest archived configuration on each shared leaderboard snapshot, ranked among the models archived in this dataset. Harness, reasoning effort and service mode can differ; self-reported and estimated results are marked. These reference configurations are not measurements of the subscriptions above. Overlapping leaderboards do not form an overall ability rating.
| Leaderboard | Metric | Claude Opus 5.5 | Claude Sonnet 5.5 | Higher archived score |
|---|---|---|---|---|
| Artificial Analysis Intelligence Index v4.3 | Intelligence Index | 57.62 #1 / 60 · Claude Opus 5.5 (max with fallback) Max 2026-10-01 · Record | 55.98 #2 / 60 · Claude Sonnet 5.5 (max with fallback) Max 2026-10-01 · Record | Claude Opus 5.5+1.64 |
| Terminal-Bench 4.0 (AA) | Resolution Rate % | 59.6 #2 / 53 · Artificial Analysis - Claude Opus 5.5 (max with fallback) Artificial Analysis · Max 2026-10-01 · Record | 63.64 #1 / 53 · Artificial Analysis - Claude Sonnet 5.5 (max with fallback) Artificial Analysis · Max 2026-10-01 · Record | Claude Sonnet 5.5+4.04 |
| Code Arena | WebDev Overall | Arena Score | 1,818 #1 / 54 · claude-opus-5.5-max Max Reported interval 1,801.5–1,834.5 2026-10-01 · Record | 1,709 #5 / 54 · claude-sonnet-5.5-high High Reported interval 1,693.4–1,724.6 2026-10-01 · Record | Claude Opus 5.5+109 |
| Artificial Analysis Coding Agent Index v1.5 | Coding Agent Index | 65.99 #2 / 19 · Claude Code - Opus 5.5 (max) Claude Code · Max 2026-10-01 · Record | 68.36 #1 / 19 · Claude Code - Sonnet 5.5 (max) Claude Code · Max 2026-10-01 · Record | Claude Sonnet 5.5+2.37 |
Official API pricing
Each row uses its listed pricing conditions. Cache writes are shown separately; subscription costs above retain their recorded quota basis. An em dash means that rate is not recorded.
| Model / pricing conditions | Cached input | Input | Cache write | Output |
|---|---|---|---|---|
| Claude Opus 5.5Upstream referenceUpstream price reference | $0.2 | $4 | — | $20 |
| Claude Sonnet 5.5Upstream referenceUpstream price reference | $0.1 | $2 | — | $10 |
How to read this comparison
Price ratios compare recorded USD/MTok under the same known workload. Raw measured totals, different workloads and unmetered access remain visible but are excluded from the lower-cost counts. Recorded allowances assume using the quota; your effective cost depends on utilization, cache mix, output mix and plan limits. Qualitative confidence is not an error bar.
- Anthropic workload: 97% cache reads / 2.5% cache writes / 0.5% output