vs
0:6
overall capability wins (0 ties across 6 scored). Claude Sonnet 5 leads overall.
- Reasoning0:2
- Coding0:1
- Arena0:1
- Pricing0:3
- Speed0:2
- Specs0:2
Verdict
Claude Sonnet 5 leads coding (widest gap: +31.4 on SciCode); Claude Sonnet 5 ranks higher on LMArena (+180 Elo); Claude Sonnet 5 offers ~5.0x larger context (1M vs 200K).
- Claude Sonnet 5 leads coding (widest gap: +31.4 on SciCode)
- Claude Sonnet 5 ranks higher on LMArena (+180 Elo)
- Claude Sonnet 5 offers ~5.0x larger context (1M vs 200K)
- Claude Sonnet 5 allows ~31.3x more max output (128K vs 4K)
- Claude Sonnet 5 is ~1.5x cheaper on a blended token basis than Claude 3 Sonnet
Cost for 1M in + 250K out
Illustrative chat workload at primary-provider list prices.
- Claude 3 Sonnet
- $6.75
- Claude Sonnet 5
- $4.50
Claude Sonnet 5 is about 1.5x cheaper on this workload.
Price per 1M tokens
Full comparison
Organization
Anthropic
Anthropic
Family
Claude Sonnet / Haiku
Claude Sonnet / Haiku
License
Proprietary
Proprietary
Open weights
No
No
Release
Mar 4, 2024
Jun 30, 2026
Knowledge cutoff
-
-
API / provider
Anthropic
Anthropic
Modalities
text, image → text
text, image → text
Specs
Context window
200K
1M
Max output
4K
128K
Parameters
—
—
Pricing
Input $/1M
$3
$2
Output $/1M
$15
$10
Blended $/1M (3∶1)
$6
$4
Speed
tok/s
65
95
TTFT (s)
0.5
0.4
Reasoning
MMLU-Pro
57.9
—
GPQA Diamond
40.0
91.1
Humanity's Last Exam
3.6
41.3
AIME 2025
—
—
MATH-500
41.4
—
Humanity's Last Exam (with tools)
—
—
AA-Omniscience Accuracy
—
40.1
AA-LCR v1.1
—
82.0
CritPt
—
16.9
MMMU-Pro
—
77.3
IFBench
—
—
Chartography
—
15.6
Chartography (With Tools)
—
—
Coding
SWE-bench Verified
—
—
SWE-bench Pro
—
—
SWE-bench Multilingual
—
—
LiveCodeBench
17.5
—
Terminal-Bench 2.1
—
80.5
Aider Polyglot
—
—
Terminal-Bench 3
—
14.6
BigCodeBench
42.7
—
SciCode
22.9
54.3
CursorBench
—
61.5
SWE-Rebench
—
56.8
NL2Repo-Bench
—
—
DeepSWE
—
54.0
WebDev Arena
—
1,537
Terminal-Bench 4.0
—
12.4
CursorBench 4.0
—
—
FrontierCode v1.1 (Main)
—
—
Arena
LMArena Elo
1,281
1,461
| Metric | Claude 3 Sonnet | Claude Sonnet 5 | Delta |
|---|---|---|---|
| Identity | |||
| Organization | Anthropic | Anthropic | — |
| Family | Claude Sonnet / Haiku | Claude Sonnet / Haiku | — |
| License | Proprietary | Proprietary | — |
| Open weights | No | No | — |
| Release | Mar 4, 2024 | Jun 30, 2026 | — |
| Knowledge cutoff | - | - | — |
| API / provider | Anthropic | Anthropic | — |
| Modalities | text, image → text | text, image → text | — |
| Specs | |||
| Context window | 200K | 1M | B +800K |
| Max output | 4K | 128K | B +124K |
| Parameters | — | — | — |
| Pricing | |||
| Input $/1M | $3 | $2 | B +$1 |
| Output $/1M | $15 | $10 | B +$5 |
| Blended $/1M (3∶1) | $6 | $4 | B +$2 |
| Speed | |||
| tok/s | 65 | 95 | B +30 |
| TTFT (s) | 0.5 | 0.4 | B +0.10 |
| Reasoning | |||
| MMLU-Pro | 57.9 | — | — |
| GPQA Diamond | 40.0 | 91.1 | B +51.1 pts |
| Humanity's Last Exam | 3.6 | 41.3 | B +37.7 pts |
| AIME 2025 | — | — | — |
| MATH-500 | 41.4 | — | — |
| Humanity's Last Exam (with tools) | — | — | — |
| AA-Omniscience Accuracy | — | 40.1 | — |
| AA-LCR v1.1 | — | 82.0 | — |
| CritPt | — | 16.9 | — |
| MMMU-Pro | — | 77.3 | — |
| IFBench | — | — | — |
| Chartography | — | 15.6 | — |
| Chartography (With Tools) | — | — | — |
| Coding | |||
| SWE-bench Verified | — | — | — |
| SWE-bench Pro | — | — | — |
| SWE-bench Multilingual | — | — | — |
| LiveCodeBench | 17.5 | — | — |
| Terminal-Bench 2.1 | — | 80.5 | — |
| Aider Polyglot | — | — | — |
| Terminal-Bench 3 | — | 14.6 | — |
| BigCodeBench | 42.7 | — | — |
| SciCode | 22.9 | 54.3 | B +31.4 pts |
| CursorBench | — | 61.5 | — |
| SWE-Rebench | — | 56.8 | — |
| NL2Repo-Bench | — | — | — |
| DeepSWE | — | 54.0 | — |
| WebDev Arena | — | 1,537 | — |
| Terminal-Bench 4.0 | — | 12.4 | — |
| CursorBench 4.0 | — | — | — |
| FrontierCode v1.1 (Main) | — | — | — |
| Arena | |||
| LMArena Elo | 1,281 | 1,461 | B +180 Elo |
Claude 3 Sonnet
- Context
- 200K / 4K out
- Parameters
- —
- Price
- $3 / $15
- Speed
- 65 tok/s · 0.5s TTFT
- Modalities
- text, image → text
- License
- Proprietary
Balanced Claude 3 mid-tier between Haiku and Opus — superseded by 3.5 / 4.x Sonnet.
Claude Sonnet 5
- Context
- 1M / 128K out
- Parameters
- —
- Price
- $2 / $10
- Speed
- 95 tok/s · 0.4s TTFT
- Modalities
- text, image → text
- License
- Proprietary
Default Claude model for Free/Pro at $2/$10 (the launch introductory rate, made permanent on 2026-08-10 - the planned 2026-09-01 increase to $3/$15 was cancelled); closes much of the gap to prior Opus on agentic tasks.
Benchmark charts
Winner bars are emphasized. Per-benchmark deltas sit above each chart.