Which is better, Claude Opus 4.7 or Claude Sonnet 4.6?

Across 64 shared benchmarks tracked on Vector Wire, Claude Opus 4.7 leads on 56 and Claude Sonnet 4.6 leads on 8 — Claude Opus 4.7 leads on more. Strengths differ by axis; the table below shows every head-to-head number with provenance.

SEEDRefresh Models —Deals —Regulatory —Sources —

Claude Opus 4.7 vs Claude Sonnet 4.6

AnthropicvsAnthropic64 shared benchmarks56–8 head-to-head

Benchmark	Claude Opus 4.7	Claude Sonnet 4.6
AA Agentic Index	64.6	61.6
AA Intelligence	55	48.4
AA-LCR	75.3	74
AA-Omniscience	27.3	12.2
arc_agi_1	92	86.5
ARC-AGI-2	75.8	60.4
arena_elo	1494	1472
arena_text_factuality	1474	1460
arena_vision	1304	1278
Artificial Analysis Coding Index	73.6	63
Blueprint-Bench 2	24.5	6.7
browsecomp	79.8	76.2
charxiv_reasoning_with_tools	91	85.3
charxiv_rq	82.1	72.4
coding_arena_elo	1557	1523
critpt	12	3.1
Finance Agent v2	51.5	51
finance_agent	71.5	63.3
frontiermath_tier_4	22.9	8.3
gdpval	58.6	54.8
GDPval-AA (Elo)	1753	1676
GPQA Diamond	94.2	89.9
harmbench	17.5	24.2
HLE	54.7	49
HLE (with tools)	54.7	46.8
Humanity’s Last Exam	46.9	33.2
IFBench	58.6	56.6
itbenchSre	46.7	39.8
Legal Agent Benchmark	7.1	5.4
livebench	76.9	75.5
livebench_agentic_coding	50.7	42.6
livebench_coding	82.1	79.3
livebench_data_analysis	78.3	78
livebench_instruction_following	66.7	63.2
livebench_language	77.9	76.1
livebench_math	92.8	87
livebench_reasoning	87.2	84.8
MCP Atlas	79.1	69.5
mmmlu	91.5	89.3
MMMU-Pro	78.8	75.6
mrcr_v2_8needle_128k_average	59.3	84.9
officeqa	86.3	68.7
officeqa_pro	80.6	53.4
OmniScience Accuracy	48.9	40.9
OmniScience Non-Hallucination	57.7	51.6
OSWorld-Verified	82.8	78.5
scicode	54.5	47
simpleqa_verified	50.6	29
SWE-bench Pro	64.3	58.1
SWE-bench Verified	87.6	79.6
TauBench V3 - Banking	34.6	34.4
Terminal-Bench 2.0	69.4	59.1
Terminal-Bench 2.1	83.1	71.2
Terminal-Bench Hard	54.5	59.1
toolathlon	59.3	49.4
Toolathlon Avg turns	25.9	16.5
Toolathlon Pass@∞	52.8	38
usamo_2026	69.3	55
vectara_answer_rate	98	99.9
vectara_avg_summary_length	149.1	114.7
vectara_factual_consistency	88	89.4
vectara_hallucination_rate ↓	12	10.6
τ²-Bench Telecom (AA run)	88.6	97.9
τ³-Bench	28.9	30.5

Best tracked score per model per benchmark (default configuration; source-attributed). ↓ marks lower-is-better metrics. Open either model for its full surface, provenance and pricing.