vs
0:13
overall capability wins (0 ties across 13 scored). Claude Opus 4.8 leads overall.
- Reasoning0:6
- Coding0:4
- Arena0:1
- Speed0:2
- Specs0:2
Verdict
Claude Opus 4.8 leads coding (widest gap: +70.6 on WebDev Elo); Claude Opus 4.8 ranks higher on LMArena (+4 Elo); Claude Opus 4.8 offers ~5.0x larger context (1M vs 200K).
- Claude Opus 4.8 leads coding (widest gap: +70.6 on WebDev Elo)
- Claude Opus 4.8 ranks higher on LMArena (+4 Elo)
- Claude Opus 4.8 offers ~5.0x larger context (1M vs 200K)
- Claude Opus 4.8 allows ~2.0x more max output (128K vs 64K)
Cost for 1M in + 250K out
Illustrative chat workload at primary-provider list prices.
- Claude Opus 4.5
- $11.25
- Claude Opus 4.8
- $11.25
Price per 1M tokens
Full comparison
Organization
Anthropic
Anthropic
Family
Claude Opus
Claude Opus
License
Proprietary
Proprietary
Open weights
No
No
Release
Nov 24, 2025
May 28, 2026
Knowledge cutoff
-
-
API / provider
Anthropic
Anthropic
Modalities
text, image → text
text, image → text
Specs
Context window
200K
1M
Max output
64K
128K
Parameters
—
—
Pricing
Input $/1M
$5
$5
Output $/1M
$25
$25
Blended $/1M (3∶1)
$10
$10
Speed
tok/s
65
72
TTFT (s)
0.6
0.55
Reasoning
MMLU-Pro
—
—
GPQA Diamond
86.6
92.0
Humanity's Last Exam
30.1
48.7
AIME 2025
—
—
MATH-500
—
—
Humanity's Last Exam (with tools)
—
—
AA-Omniscience Accuracy
46.6
48.8
AA-LCR v1.1
77.3
77.7
CritPt
4.6
20.9
MMMU-Pro
74.0
—
IFBench
58.0
62.2
Chartography
—
—
Chartography (With Tools)
—
—
Coding
SWE-bench Verified
—
—
SWE-bench Pro
45.9
69.2
SWE-bench Multilingual
70.7
—
LiveCodeBench
—
—
Terminal-Bench 2.1
—
84.6
Aider Polyglot
—
—
Terminal-Bench 3
—
21.1
BigCodeBench
—
—
SciCode
49.5
54.4
CursorBench
—
62.3
SWE-Rebench
53.1
56.5
NL2Repo-Bench
—
—
DeepSWE
—
59.0
WebDev Arena
1,468
1,539
Terminal-Bench 4.0
—
23.6
CursorBench 4.0
—
—
FrontierCode v1.1 (Main)
—
—
Arena
LMArena Elo
1,470
1,473
| Metric | Claude Opus 4.5 | Claude Opus 4.8 | Delta |
|---|---|---|---|
| Identity | |||
| Organization | Anthropic | Anthropic | — |
| Family | Claude Opus | Claude Opus | — |
| License | Proprietary | Proprietary | — |
| Open weights | No | No | — |
| Release | Nov 24, 2025 | May 28, 2026 | — |
| Knowledge cutoff | - | - | — |
| API / provider | Anthropic | Anthropic | — |
| Modalities | text, image → text | text, image → text | — |
| Specs | |||
| Context window | 200K | 1M | B +800K |
| Max output | 64K | 128K | B +64K |
| Parameters | — | — | — |
| Pricing | |||
| Input $/1M | $5 | $5 | tie |
| Output $/1M | $25 | $25 | tie |
| Blended $/1M (3∶1) | $10 | $10 | tie |
| Speed | |||
| tok/s | 65 | 72 | B +7.00 |
| TTFT (s) | 0.6 | 0.55 | B +0.05 |
| Reasoning | |||
| MMLU-Pro | — | — | — |
| GPQA Diamond | 86.6 | 92.0 | B +5.4 pts |
| Humanity's Last Exam | 30.1 | 48.7 | B +18.6 pts |
| AIME 2025 | — | — | — |
| MATH-500 | — | — | — |
| Humanity's Last Exam (with tools) | — | — | — |
| AA-Omniscience Accuracy | 46.6 | 48.8 | B +2.2 pts |
| AA-LCR v1.1 | 77.3 | 77.7 | B +0.4 pts |
| CritPt | 4.6 | 20.9 | B +16.3 pts |
| MMMU-Pro | 74.0 | — | — |
| IFBench | 58.0 | 62.2 | B +4.2 pts |
| Chartography | — | — | — |
| Chartography (With Tools) | — | — | — |
| Coding | |||
| SWE-bench Verified | — | — | — |
| SWE-bench Pro | 45.9 | 69.2 | B +23.3 pts |
| SWE-bench Multilingual | 70.7 | — | — |
| LiveCodeBench | — | — | — |
| Terminal-Bench 2.1 | — | 84.6 | — |
| Aider Polyglot | — | — | — |
| Terminal-Bench 3 | — | 21.1 | — |
| BigCodeBench | — | — | — |
| SciCode | 49.5 | 54.4 | B +4.9 pts |
| CursorBench | — | 62.3 | — |
| SWE-Rebench | 53.1 | 56.5 | B +3.4 pts |
| NL2Repo-Bench | — | — | — |
| DeepSWE | — | 59.0 | — |
| WebDev Arena | 1,468 | 1,539 | B +71 Elo |
| Terminal-Bench 4.0 | — | 23.6 | — |
| CursorBench 4.0 | — | — | — |
| FrontierCode v1.1 (Main) | — | — | — |
| Arena | |||
| LMArena Elo | 1,470 | 1,473 | B +4 Elo |
Claude Opus 4.5
- Context
- 200K / 64K out
- Parameters
- —
- Price
- $5 / $25
- Speed
- 65 tok/s · 0.6s TTFT
- Modalities
- text, image → text
- License
- Proprietary
Late-2025 Opus release that set a high bar on SWE-bench; superseded by 4.8 and Opus 5 for new projects.
Claude Opus 4.8
- Context
- 1M / 128K out
- Parameters
- —
- Price
- $5 / $25
- Speed
- 72 tok/s · 0.55s TTFT
- Modalities
- text, image → text
- License
- Proprietary
Previous Opus flagship with 1M context; still competitive for coding agents and computer use.
Benchmark charts
Winner bars are emphasized. Per-benchmark deltas sit above each chart.